The invention provides a service message processing method and system. The invention discloses a service message processing method. The method is applied to centralized control frame type equipment. The centralized control frame type device comprises a main control board card and at least one safety service board card. A main control CPU is arranged on the main control board card; wherein an independent CPU exists on the security service board card, the main control board card is connected with the security service board card based on a backboard, and the method comprises the steps that the security service board card detects the state of a port of the independent CPU reported by a service message on the security service board card according to a preset detection period; If it is detectedthat the state of the port of the independent CPU reported by the service message on the security service board card is a DOWN state, the security service board card reports the received service message to the main control CPU on the main control board card; And the main control CPU on the main control board card receives the service message and performs corresponding service processing on the service message.