diff --git a/docs/source/install.rst b/docs/source/install.rst
index ecdfb76..fc91597 100644
--- a/docs/source/install.rst
+++ b/docs/source/install.rst
@@ -1,6 +1,9 @@
 Install
 =======
-In the following, it is shown how to install Quantum ESPRESSO and BURAI.
+In the following, it is shown how to install BURAI: 
+to download and set it.
+|
+Optionally, it may be possible to install Quantum ESPRESSO.
 
 -------------------------------------------------------------------------------------------------
 
@@ -9,4 +12,5 @@ In the following, it is shown how to install Quantum ESPRESSO and BURAI.
 
    install/download
    install/setting
+   install/option
 
diff --git a/docs/source/install/download.rst b/docs/source/install/download.rst
index b5d7a24..2e670a7 100644
--- a/docs/source/install/download.rst
+++ b/docs/source/install/download.rst
@@ -1,29 +1,10 @@
 Download
 ========
 
-Quantum ESPRESSO
-----------------
+You can download executables from here:
+|
+* 'Windows <https://github.com/BURAI-team/burai/releases/download/ver.1.2/BURAI1.2_Windows.zip> '_
+* 'Mac OSX <https://github.com/BURAI-team/burai/releases/download/ver.1.2/BURAI1.2_MacOSX.zip> '_
 
-Quantum ESPRESSO is able to be downloaded form `here <http://www.quantum-espresso.org/>`_ .
-
-.. note::
-
-    BURAI platform already contains quantum espresso executable files for Windows and Mac OS.
-    The detailed explanation is shown in setting. :doc:`./setting`
-
-BURAI
------
-
-BURAI which is a GUI system of Quantum ESPRESSO is able to be downloaded from `BURAI homepage <http://nisihara.wixsite.com/burai>`_ .
-
-.. csv-table:: Download file list
-    :header: "Item", "explanation"
-    :widths: 25, 35
-
-    "burai.jar", "jar file of BURAI"
-    "BURAI1.2_MacOSX.zip", "BURAI executable file for Mac OS"
-    "BURAI1.2_Windows.zip", "BURAI executable file for Windows OS"
-    "Source code (zip)", "Compressed source code file. (zip format) "
-    "Source code (tar.gz)", "Compressed source code file. (tar.gz format) "
-
-After downloading, you unzip the compressed BURAI executable file to any directory on your computer.
+... note::
+	These zip-files contain precompiled executable files of Quantum ESPRESSO.
diff --git a/docs/source/install/option.rst b/docs/source/install/option.rst
new file mode 100644
index 0000000..fb462fe
--- /dev/null
+++ b/docs/source/install/option.rst
@@ -0,0 +1,9 @@
+Quantum ESPRESSO (optionally)
+=============================
+
+Although BURAI contains executables of Quantum ESPRESSO,
+|
+it is allowed to install other executables optionally `from here <http://www.quantum-espresso.org>`_.
+
+... note::
+	However, the other executalbes are not recommened.
\ No newline at end of file
diff --git a/docs/source/install/setting.rst b/docs/source/install/setting.rst
index 0b7b9d7..71238c7 100644
--- a/docs/source/install/setting.rst
+++ b/docs/source/install/setting.rst
@@ -1,18 +1,11 @@
 Setting
 =======
 
-This page explains how to install Quantum ESPRESSO and BURAI.
-Users do not need to install Quantum ESPRESSO, because BURAI system already has the Quantum ESPRESSO executables.
-These executables were compiled by BURAI team.
-if users want to use other Quantum ESPRESSO version, the users should install it and set the path at QE path menue.
-
-BURAI
------
-
-After :doc:`downloading <./download.rst>`, you unzip the file to any directory on your computer.
-The unzipped directory contains BURAI.exe file. The file boot up the BURAI platform.
-
-.. note::
-
-    BURAI platform need JRE1.8 or later version. Therefore, you need to install these before you start BURAI platform.
+1. unzip `the downloaded file <./download.rst>`
+2. copy it to any directory on your computer e.g.: 
+|
+   for Windows, C:¥BURAI1.2_Windows¥ 
+|
+   for MacOSX, /Applications/BURAI1.2.app
+3. install `JRE1.8 or later version <https://java.com/download/>`_, if your computer does not have it.