diff --git a/autoload/SpaceVim/layers/lang/ruby.vim b/autoload/SpaceVim/layers/lang/ruby.vim
index 6ba5c3509..b2d08eef0 100644
--- a/autoload/SpaceVim/layers/lang/ruby.vim
+++ b/autoload/SpaceVim/layers/lang/ruby.vim
@@ -33,4 +33,8 @@ function! s:language_specified_mappings() abort
   call SpaceVim#mapping#space#langSPC('nmap', ['l','s', 's'],
         \ 'call SpaceVim#plugins#repl#send("selection")',
         \ 'send selection and keep code buffer focused', 1)
+  let g:_spacevim_mappings_space.l.c = {'name' : '+RuboCop'}
+  call SpaceVim#mapping#space#langSPC('nmap', ['l','c', 'f'],
+        \ 'Noeformat rubocop',
+        \ 'Runs RuboCop on the currently visited file', 1)
 endfunction
diff --git a/docs/layers/lang/ruby.md b/docs/layers/lang/ruby.md
index 8993dfad3..b888a2b1f 100644
--- a/docs/layers/lang/ruby.md
+++ b/docs/layers/lang/ruby.md
@@ -8,8 +8,13 @@ description: "This layer is for ruby development, provide autocompletion, syntax
 <!-- vim-markdown-toc GFM -->
 
 - [Description](#description)
-- [Layer Installation](#layer-installation)
+- [Installation](#installation)
+  - [Layer](#layer)
+  - [Syntax checking && Code formatting](#syntax-checking--code-formatting)
 - [Key bindings](#key-bindings)
+  - [Inferior REPL process](#inferior-repl-process)
+  - [RuboCop](#rubocop)
+  - [Running current script](#running-current-script)
 
 <!-- vim-markdown-toc -->
 
@@ -17,8 +22,41 @@ description: "This layer is for ruby development, provide autocompletion, syntax
 
 This layer is for ruby development.
 
-## Layer Installation
+## Installation
+
+### Layer
 
 To use this configuration layer, add `SPLayer 'lang#ruby'` to your custom configuration file.
 
+### Syntax checking && Code formatting
+
+To enable syntax checking and code formatting in spacevim, you need to install [cobocop](https://github.com/bbatsov/rubocop).
+
+```sh
+gem install rubocop
+```
+
+
 ## Key bindings
+
+### Inferior REPL process
+
+Start a `irb` inferior REPL process with `SPC l s i`. 
+
+Send code to inferior process commands:
+
+| Key Binding | Description                                      |
+| ----------- | ------------------------------------------------ |
+| `SPC l s b` | send buffer and keep code buffer focused         |
+| `SPC l s l` | send line and keep code buffer focused           |
+| `SPC l s s` | send selection text and keep code buffer focused |
+
+### RuboCop
+
+| Key Binding | Description                                |
+| ----------- | ------------------------------------------ |
+| `SPC l c f` | Runs RuboCop on the currently visited file |
+
+### Running current script
+
+To running a python script, you can press `SPC l r` to run current file without loss focus, and the result will be shown in a runner buffer.