The invention provides a cross-team communication method and device. The cross-team communication method may comprise the steps of showing an alternative member set to a creator when a creation request of the creator for a cross-team group is detected, wherein the alternative member set comprises information of team members of the team which belongs to the creator and information of other memberswho do not belong to the team of the creator; determining target members from the alternative member set based on a member selection operation carried out by the creator; and creating a correspondingcross-team
group based on the creator and the target members, thereby realizing cross-team communication among members of the groups. Through the technical scheme of the invention, cross-team communication demands can be met.