The present invention provides a system for avoiding a repeated request for loading of dynamically cached graphic data. The system comprises a P set maintenance unit, a Q set maintenance unit, a boundary comparison unit, and a graphic loading unit that are on an application side. The P set maintenance unit is used for creating a P element set and adding a P element into the P element set. The Q set maintenance unit is used for creating a Q element set, and when an interactive operation is performed, adding a Q element into the Q element set. The boundary comparison unit is used for comparing all Q elements with each P element separately. The graphic loading unit is used for sending a request to a server, wherein the request is used for loading graphic data in rectangular areas corresponding to all Q elements in the Q element set. The invention further provides a corresponding method. According to the system and method provided by the invention, rectangular boundaries of a to-be-requested graphic data set and rectangular boundaries of a previously requested and cached graphic data set are compared separately, thereby avoiding the operation of repeatedly loading graphic data.