Disclosed are a method and system for parameter configuration of a mobile terminal. The method includes that a mobile terminal sends a trigger message for requesting configuration to a unified configuration server; the unified configuration server parses the trigger message to obtain information of an operator in an environment where the mobile terminal currently is, and sends the information of the operator to an operator database server; the operator database server configures, according to the information of the operator, configuration information currently required by the mobile terminal, and sends the configuration information to the mobile terminal; the mobile terminal receives and parses the configuration information, and performs corresponding configuration on the mobile terminal according to the configuration information. By the method of the disclosure, when a mobile terminal is in a region where some functions are not available, the mobile terminal actively requests a server to configure and modify client parameters, so as to achieve the beneficial effect that service software can always be used normally no matter which environment the mobile terminal locates, thereby improving the user experience and normal life of users in the region.