Quick-releasing toilet seat attached system and method

The quick-releasing toilet seat attached system comprises a connection body and a column of a side cooperation part. The toilet seat in the closestool assembly can be attached to the closestool in a detachable manner. The column possess a rod which can extend and pass through the installation holes on the closestool and a column connection part. The connection body comprises a pivoting part, a movable cover and a reception opening. The column connection part is defined through the characteristic of radial orientation, like the annular parts of the plate shape with different diamter. Part of periphery of the receiving opening possess a profile which is contrast to the characteristics of the column connection part so as to enable the concoction part can be in side match with the column connection part. The cover can move between the closing position where prevents the connection part from disconnecting with the column and an opening position where the connection part can be detached from the column.