The invention relates to the field of communications, and discloses a method and a device for establishing a many-to-one wireless one-screen session. The method comprises the steps of receiving service access requests sent by at least two clients, respectively allocating a corresponding service type of local idle source to the service requested by each client, then receiving service data sent by the at least two clients, and respectively representing the service data of the corresponding clients based on the corresponding service type of local idle source allocated to each client. In this case, the corresponding service type of local idle source is allocated to each client in real time via the received service access requests, so that the many-to-one wireless one-screen session can be realized; and resource negotiation with the connected clients can be realized, so that the processing capability of a receiver is furthest utilized to accept the service access requests of multiple clients.