Aiming at the invalid accesses and memory redundancies caused by data overlap of more than one logic map tile in the visualization process of virtual earth, an optimal retrieval method of multi-theme tiles considering the spatio-temporal semantics was proposed. On the client side, the self-adoptive retrieval of tiles considering spatio-temporal semantics automatically matches the viewpoint information with semantics of datasets like space-time range, resolution and priority, then the invalid selection was filtered and the efficiency of target tiles data hit ratio was improved. On the server side, the theme oriented data cache based on memory database was achieved to prompt the response speed of server in the second access of tiles. Finally, the experiments prove that this method can prevent stable and high hitrate of target tile affected by amount of datasets and the cache method can further improve the efficiency of tiles access. The realtime visualization performance of massive image data is significantly improved.