A location information collection method and system for dual SIM mobile terminals are provided. The method includes sending, by a mobile terminal, a request for location information of the dual Subscriber Identity Module (SIM) terminal to at least one of multiple service centers providing communication services related respectively to SIM cards of the dual SIM terminal, collecting, by the at least one service center, information regarding multiple base stations in which identification information elements of the SIM cards are respectively last registered, and generating tentative location information of the dual SIM terminal based on the collected base station information, and sending, by the at least one service center, the base station information or the tentative location information to the mobile terminal.