Abstract: Disclosed are a method, a device and a system for message distribution. The method includes: receiving, by a message distributor, an application APP message sent by a message providing platform, the APP message comprising index information regarding to APP online or APP updating; and duplicating the received APP message, and writing a copy of the APP message into each message queue connected to the message distributor, the message queue being a data transmission channel, one end being connected to a terminal service platform, the other end being connected to the message distributor, each terminal service platform separately acquiring the APP message from a message queue connected to the terminal service platform, and then determining, according to the index information, whether the APP message is an APP message required for the terminal service platform.