diff --git a/dot_config/nvim/Readme.md b/dot_config/nvim/Readme.md
index 8e7f0d0..ea736ad 100644
--- a/dot_config/nvim/Readme.md
+++ b/dot_config/nvim/Readme.md
@@ -63,6 +63,28 @@ dot_config/nvim
 └── Readme.md
 ```
 
+## LSP -Language Server Protocol
+因為設定方式與結構太過複雜，故獨立開
+
+### 和LSP有關的目錄結構
+```
+~/.config/nvim/
+├── lua/
+│   ├── plugins/
+│   │   ├── lsp.lua               <-- 所有 LSP / cmp 相關 plugin 定義
+│   ├── lsp/
+│   │   ├── init.lua              <-- 初始化 Mason / LSP 等
+│   │   ├── config/
+│   │   │   ├── mason.lua         <-- 1. Mason 設定，需要的程式語言安裝都在這定義
+│   │   │   ├── lspconfig.lua     <-- 2. 載入各語言的設定
+│   │   │   └── cmp.lua           <-- nvim-cmp 設定
+│   │   └── servers/
+│   │       ├── php.lua
+│   │       ├── pyright.lua
+│   │       └── ...
+│   └──（可另外有 config/、keymaps/ 等其他模組）
+```
+
 ## 代找外掛
  * Align
  *
diff --git a/dot_config/nvim/exact_lua/exact_plugins/lsp.lua b/dot_config/nvim/exact_lua/exact_plugins/lsp.lua
new file mode 100644
index 0000000..a5f8726
--- /dev/null
+++ b/dot_config/nvim/exact_lua/exact_plugins/lsp.lua
@@ -0,0 +1,50 @@
+-- 專責 LSP / 補全相關 plugin 定義
+return {
+  -- 依照mason官方教學抄過來 https://github.com/williamboman/mason-lspconfig.nvim
+  "williamboman/mason.nvim",
+  "williamboman/mason-lspconfig.nvim",
+  "neovim/nvim-lspconfig",
+
+  -- 補全相關
+  -- 以下為 hrsh7th/nvim-cmp 的官方範例
+  -- call plug#begin(s:plug_dir)
+  -- Plug 'neovim/nvim-lspconfig'
+  -- Plug 'hrsh7th/cmp-nvim-lsp'
+  -- Plug 'hrsh7th/cmp-buffer'
+  -- Plug 'hrsh7th/cmp-path'
+  -- Plug 'hrsh7th/cmp-cmdline'
+  -- Plug 'hrsh7th/nvim-cmp'
+
+  -- " For vsnip users.
+  -- Plug 'hrsh7th/cmp-vsnip'
+  -- Plug 'hrsh7th/vim-vsnip'
+
+  -- " For luasnip users.
+  -- " Plug 'L3MON4D3/LuaSnip'
+  -- " Plug 'saadparwaiz1/cmp_luasnip'
+
+  -- " For mini.snippets users.
+  -- " Plug 'echasnovski/mini.snippets'
+  -- " Plug 'abeldekat/cmp-mini-snippets'
+
+  -- " For ultisnips users.
+  -- " Plug 'SirVer/ultisnips'
+  -- " Plug 'quangnguyen30192/cmp-nvim-ultisnips'
+
+  -- " For snippy users.
+  -- " Plug 'dcampos/nvim-snippy'
+  -- " Plug 'dcampos/cmp-snippy'
+
+  -- call plug#end()
+  { "hrsh7th/cmp-nvim-lsp" },
+  { "hrsh7th/cmp-buffer" },
+  { "hrsh7th/cmp-path" },
+  { "hrsh7th/cmp-cmdline" },
+  { "hrsh7th/nvim-cmp" },
+
+  -- " For luasnip users.
+  { "L3MON4D3/LuaSnip" },
+  { "saadparwaiz1/cmp_luasnip" },
+
+  { "rafamadriz/friendly-snippets" },
+}
diff --git a/dot_config/nvim/exact_lua/init.lua b/dot_config/nvim/exact_lua/init.lua
index e4f0fbb..d56ae60 100644
--- a/dot_config/nvim/exact_lua/init.lua
+++ b/dot_config/nvim/exact_lua/init.lua
@@ -3,5 +3,6 @@ require("config.options")
 require("config.keymaps_nvim")
 require("config.keymaps")
 require("config.gui")
-require("config.lazy")
+require("config.lazy")     -- 初始化 Lazy.nvim
+require("lsp")             -- LSP 與 cmp 設定
 require("config.terminal") -- 因為會被lazy.nvim override，所以要放在最後
diff --git a/dot_config/nvim/exact_lua/lsp/exact_config/cmp.lua b/dot_config/nvim/exact_lua/lsp/exact_config/cmp.lua
new file mode 100644
index 0000000..41be11f
--- /dev/null
+++ b/dot_config/nvim/exact_lua/lsp/exact_config/cmp.lua
@@ -0,0 +1,84 @@
+-- Set up nvim-cmp.
+local cmp = require'cmp'
+
+cmp.setup({
+  snippet = {
+    -- REQUIRED - you must specify a snippet engine
+    expand = function(args)
+      vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
+      require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+      -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
+      -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+      -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
+
+      -- For `mini.snippets` users:
+      -- local insert = MiniSnippets.config.expand.insert or MiniSnippets.default_insert
+      -- insert({ body = args.body }) -- Insert at cursor
+      -- cmp.resubscribe({ "TextChangedI", "TextChangedP" })
+      -- require("cmp.config").set_onetime({ sources = {} })
+    end,
+  },
+  window = {
+    -- completion = cmp.config.window.bordered(),
+    -- documentation = cmp.config.window.bordered(),
+  },
+  mapping = cmp.mapping.preset.insert({
+    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete(),
+    ['<C-e>'] = cmp.mapping.abort(),
+    ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+
+    -- AI範例:
+    -- ["<Tab>"] = cmp.mapping.select_next_item(),
+    -- ["<S-Tab>"] = cmp.mapping.select_prev_item(),
+    -- ["<CR>"] = cmp.mapping.confirm({ select = true }),
+  }),
+  sources = cmp.config.sources({
+    { name = 'nvim_lsp' },
+    -- { name = 'vsnip' }, -- For vsnip users.
+    { name = 'luasnip' }, -- For luasnip users.
+    -- { name = 'ultisnips' }, -- For ultisnips users.
+    -- { name = 'snippy' }, -- For snippy users.
+  }, {
+    { name = 'buffer' },
+  })
+})
+
+-- To use git you need to install the plugin petertriho/cmp-git and uncomment lines below
+-- Set configuration for specific filetype.
+--[[ cmp.setup.filetype('gitcommit', {
+  sources = cmp.config.sources({
+    { name = 'git' },
+  }, {
+    { name = 'buffer' },
+  })
+})
+require("cmp_git").setup() ]]--
+
+-- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline({ '/', '?' }, {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = {
+    { name = 'buffer' }
+  }
+})
+
+-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline(':', {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = cmp.config.sources({
+    { name = 'path' }
+  }, {
+    { name = 'cmdline' }
+  }),
+  matching = { disallow_symbol_nonprefix_matching = false }
+})
+
+-- 已經由lspconfig.lua來處理，故註解掉
+-- -- Set up lspconfig.
+-- local capabilities = require('cmp_nvim_lsp').default_capabilities()
+-- -- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
+-- require('lspconfig')['<YOUR_LSP_SERVER>'].setup {
+--   capabilities = capabilities
+-- }
diff --git a/dot_config/nvim/exact_lua/lsp/exact_config/lspconfig.lua b/dot_config/nvim/exact_lua/lsp/exact_config/lspconfig.lua
new file mode 100644
index 0000000..88dcaff
--- /dev/null
+++ b/dot_config/nvim/exact_lua/lsp/exact_config/lspconfig.lua
@@ -0,0 +1,31 @@
+local lspconfig = require("lspconfig")
+local capabilities = require("cmp_nvim_lsp").default_capabilities()
+
+local on_attach = function(_, bufnr)
+  local map = function(mode, lhs, rhs)
+    vim.keymap.set(mode, lhs, rhs, { buffer = bufnr })
+  end
+  map("n", "gd", vim.lsp.buf.definition)
+  map("n", "K", vim.lsp.buf.hover)
+end
+
+local servers = {
+  "phpactor",
+  "pyright",
+  "gopls",
+  "html",
+  "cssls",
+  -- "tsserver", -- TODO: tsserver is deprecated, use ts_ls instead.
+}
+
+-- 載入所有的對應的 LSP server 設定
+--
+-- 相關設定請看
+-- <https://github.com/neovim/nvim-lspconfig/blob/master/doc/configs.md>
+for _, name in ipairs(servers) do
+  local ok, config = pcall(require, "lsp.servers." .. name)
+  if not ok then config = {} end
+  config.capabilities = capabilities
+  config.on_attach = on_attach
+  lspconfig[name].setup(config)
+end
diff --git a/dot_config/nvim/exact_lua/lsp/exact_config/mason.lua b/dot_config/nvim/exact_lua/lsp/exact_config/mason.lua
new file mode 100644
index 0000000..11e77db
--- /dev/null
+++ b/dot_config/nvim/exact_lua/lsp/exact_config/mason.lua
@@ -0,0 +1,35 @@
+require("mason").setup()
+require("mason-lspconfig").setup {
+  -- A list of servers to automatically install if they're not already installed. Example: { "rust_analyzer@nightly", "lua_ls" }
+  -- This setting has no relation with the `automatic_installation` setting.
+  ---@type string[]
+  ensure_installed = {
+    -- "lua_ls", "rust_analyzer" -- 官方範例
+    "phpactor",
+    "pyright",
+    "gopls",
+    "html",
+    "cssls",
+    "tsserver",
+   },
+
+  -- Whether servers that are set up (via lspconfig) should be automatically installed if they're not already installed.
+  -- This setting has no relation with the `ensure_installed` setting.
+  -- Can either be:
+  --   - false: Servers are not automatically installed.
+  --   - true: All servers set up via lspconfig are automatically installed.
+  --   - { exclude: string[] }: All servers set up via lspconfig, except the ones provided in the list, are automatically installed.
+  --       Example: automatic_installation = { exclude = { "rust_analyzer", "solargraph" } }
+  ---@type boolean
+  automatic_installation = false,
+
+  -- See `:h mason-lspconfig.setup_handlers()`
+  ---@type table<string, fun(server_name: string)>?
+  handlers = nil,
+}
+
+-- 下面這段先註解掉，由lspconfig.lua來處理
+-- -- After setting up mason-lspconfig you may set up servers via lspconfig
+-- require("lspconfig").lua_ls.setup {}
+-- require("lspconfig").rust_analyzer.setup {}
+-- -- ...
diff --git a/dot_config/nvim/exact_lua/lsp/exact_servers/phpactor.lua b/dot_config/nvim/exact_lua/lsp/exact_servers/phpactor.lua
new file mode 100644
index 0000000..c015f5f
--- /dev/null
+++ b/dot_config/nvim/exact_lua/lsp/exact_servers/phpactor.lua
@@ -0,0 +1,17 @@
+return {
+  init_options = {
+    ["language_server_phpstan.enabled"] = true,
+    ["language_server_psalm.enabled"] = false,
+  }
+  -- settings = {
+  --   -- 自訂 PHPactor 設定（如果有的話）
+  -- },
+}
+
+-- 僅對照用
+-- require("lspconfig").phpactor.setup({
+--   init_options = {
+--     ["language_server_phpstan.enabled"] = true,
+--     ["language_server_psalm.enabled"] = false,
+--   }
+-- })
diff --git a/dot_config/nvim/exact_lua/lsp/init.lua b/dot_config/nvim/exact_lua/lsp/init.lua
new file mode 100644
index 0000000..2a74f2c
--- /dev/null
+++ b/dot_config/nvim/exact_lua/lsp/init.lua
@@ -0,0 +1,3 @@
+require("lsp.config.mason")
+require("lsp.config.lspconfig")
+require("lsp.config.cmp")