The invention discloses a method and a system for transmitting cell mobility state information in LTE (Long Term Evolution), used for solving the technical problem of the change notification mode of the mobility state of a cell in the charge of an adjacency base station in an LTE ad hoc network. In the invention, the adjacency base station of the change can be informed of the mobility state of a cell in the charge of current base station through updating a configuration message by using a base station of an X2 interface, or establishing a request message or a response message by using the X2 interface; a resource base stage also can inform a target base station of the cell mobility state information of a cell in the charge of the resource base station by embedding the cell mobility state information in information of switch preparation failure; and when the cell in the charge of the resource base station is about to modify the physical address of the cell, the target base station can be informed that the cell mobility state of the cell in the charge of the resource base station is in an unavailable state by sending a specific cell physical address modification instruction message. The technical scheme of the invention can ensure successful self-optimization of the current cell, improve network switch success rate and enhance network performance.