The invention relates to the technical field of wireless communication, in particular to a method and a device for service triggering which are used to solve the problem that the service triggering mechanism is not flexible enough in the prior art. The method includes the following steps: an S-CSCF (Serving-Call Session Control Function) matches a currently used initial filter criterion in an initial filter criterion trigger chain with an initial request message of a user, and determines a matching result; the S-CSCF determines an operation mode corresponding to the matching result from operation modes corresponding to the currently used initial filter criterion; and the S-CSCF executes an operation corresponding to the determined operation mode. The next operation is determined after the initial request message is matched with the currently used initial filter criterion. Therefore, operations corresponding to different services can be executed flexibly, and there is no need to match the initial request message with each initial filter criterion in the initial filter criterion trigger chain in turn.