The invention provides a power grid device message management method and system. The method comprises the following steps: a message publisher sends a message to an intra-domain message management service where the message publisher is located; and the intra-domain message management service sends the message to a message receiver according to a preset distribution policy, wherein the message sender or the message receiver comprises a power grid device; and the distribution policy comprises intra-domain or inter-domain distribution. According to the method and system, the power grid device ispackaged into a message object comprising the message sender and the message receiver, the problem of instant message interaction in a wide area is mainly solved, and a message communication service interface is adopted to realize an instant message service of maintenance-free message sending and receiving.