The invention relates to an information interaction method. By adopting the method, the information interaction process is effectively simplified, the information interaction time is shortened, and various kinds of upper applications are supported. According to the technical scheme, the information interaction method between a power grid space information service platform and a power distribution automatic system is characterized in that the method comprises the following steps that: 1) a power grid GIS platform sends a power grid structure change message to a JMS message queue of an enterprise service bus; 2) an information exchange bus gateway receives the message and then forwards the message to an information exchange bus of a corresponding city; 3) the message is sent to the power distribution automatic system of the corresponding city; 4) the power distribution automatic system of the corresponding city receives a request and establishes connection; 5) the service request establishes service, and after corresponding business processing is completed by the service, a connection token is returned; 6) the power distribution automatic system obtains power grid figure model data; 7) the power grid figure model data is returned to the power distribution automatic system; and 8) the power distribution automatic system calls a connection closing service.