A search method is provided, which includes: receiving a search request; extracting a user interest model from user personalized data according to the search request; obtaining a meta index of each member engine; selecting a member engine according to the meta index of each member engine, the search request, and the user interest model; and sending the search request to the selected member engine, so as to enable the selected member engine to complete searching. Correspondingly, a search system and related device, such as a search server and a scheduling server, are also provided, thereby improving the system efficiency and search precision.