diff --git a/lib/dingtalk/api/base.rb b/lib/dingtalk/api/base.rb
index 99cc7bb..bd75e3f 100644
--- a/lib/dingtalk/api/base.rb
+++ b/lib/dingtalk/api/base.rb
@@ -4,12 +4,17 @@ module Dingtalk
       attr_accessor :corp_id
       ACCESS_TOKEN = "access_token"
 
-      def initialize(corp_id = nil)
+      def initialize(corp_id = nil, permanent_code = nil)
         @corp_id = corp_id
+        @permanent_code = permanent_code
       end
 
       def access_token
-        "#{corp_id}_#{ACCESS_TOKEN}"
+        redis.get("#{corp_id}_#{ACCESS_TOKEN}") || set_access_token
+      end
+
+      def set_access_token
+        Suite.new.set_corp_access_token(@corp_id, @permanent_code)
       end
 
       private
diff --git a/lib/dingtalk/api/suite.rb b/lib/dingtalk/api/suite.rb
index 4521f95..c93c484 100644
--- a/lib/dingtalk/api/suite.rb
+++ b/lib/dingtalk/api/suite.rb
@@ -5,10 +5,9 @@ module Dingtalk
       SUITE_ACCESS_TOKEN = "suite_access_token"
       EXPIRATION = 7200
 
-      def initialize(suite_key, suite_secret)
-        # put them into config file?
-        @suite_key = suite_key
-        @suite_secret = suite_secret
+      def initialize
+        @suite_key = Dingtalk.suite_key
+        @suite_secret = Dingtalk.suite_secret
       end
 
       def get_permanent_code(tmp_auth_code)
@@ -29,13 +28,25 @@ module Dingtalk
           suite_secret: @suite_secret,
           suite_ticket: suite_ticket
         }
-        http_post('get_suite_token', params)
-        # TODO check response values
+        res = http_post('get_suite_token', params)
+        # TODO globally check response values
         redis.set(SUITE_ACCESS_TOKEN, res['suite_access_token'])
         redis.expire(SUITE_ACCESS_TOKEN, EXPIRATION)
         redis.get(SUITE_ACCESS_TOKEN)
       end
 
+      def set_corp_access_token(corp_id, permanent_code)
+        params = {
+          suite_access_token: suite_access_token,
+          permanent_code: permanent_code,
+          auth_corpid: corp_id
+        }
+        res = http_post('get_corp_token', params)
+        redis.set("#{corp_id}_#{ACCESS_TOKEN}", res['access_token'])
+        redis.expire("#{corp_id}_#{ACCESS_TOKEN}", EXPIRATION)
+        redis.get("#{corp_id}_#{ACCESS_TOKEN}")
+      end
+
       def suite_ticket
         redis.get(SUITE_TICKET)
       end
diff --git a/lib/dingtalk/config.rb b/lib/dingtalk/config.rb
index ca4919b..5fb7ece 100644
--- a/lib/dingtalk/config.rb
+++ b/lib/dingtalk/config.rb
@@ -10,9 +10,17 @@ module Dingtalk
       return nil unless self.config
       @redis ||= config.redis
     end
+
+    def suite_key
+      @suite_key ||= config.suite_key
+    end
+
+    def suite_secret
+      @suite_secret ||= config.suite_secret
+    end
   end
 
   class Config
-    attr_accessor :redis
+    attr_accessor :redis, :redis_options, :suite_key, :suite_secret
   end
 end
--
libgit2 0.21.0