Provided in the embodiments of the present invention are a method, a device and a system for setting an MCPTT group. The method comprises receiving a group selection request by a first network device; the group selection request being used to indicate that a first MCPTT group is set as the MCPTT group selected by a first MCPTT user; the first network device, according to the group selection request, sending information of the first MCPTT group to a first UE used by the first MCPTT user; enabling the first network device to set the first MCPTT group as the MCPTT group selected by the first MCPTT user, thereby allowing one MCPTT user or network system to set a selected MCPTT group for other MCPTT users.