In the field of wireless communications technologies, a method, a device and a system for transmitting a push message are provided, which solve the technical problem that a push message may not be transmitted in an appropriate Point To Multipoint (PTM) bearer mode in the prior art. The method includes: determining at least one mode in PTM bearer modes for a received push message; adapting respectively, for the push message, a transmission bearer type corresponding to the at least one mode; and transmitting the adapted push message to a terminal through a PTM bearer network corresponding to the transmission bearer type.