Provided are a method and a device for dynamically constructing a virtual cell. The method includes: a master station sending an event A4 to UE and receiving an A4 measurement report from the UE; and the master station adding a cell corresponding to a cell identity carried in the A4 measurement report as a slave station, herein the master station and slave stations form a first virtual cell. In the technical solution, a serving cell selected by UE may be any cell and is not necessary to be a macro cell, the master station adds a cell which satisfies an event A4 as a slave station and thereby a virtual cell is realized.