Various embodiments provide a method and system for handling a message on an instant messaging (IM) open platform. In an exemplary method, a message sent to a network application can be received. The network application can be an application plugged in the IM open platform. The received message can be pushed to an access address of the network application. A reply message returned by the network application based on the message can be received and forwarded. An exemplary system for handling a message on an instant messaging (IM) open platform can include a receiving module, a pushing module, and/or a reply processing module.