A cell change method comprising: receiving, by a terminal, a measurement control message sent from a network device, and measuring a to-be-measured cell indicated in the measurement control message, to obtain a signal measurement value of each cell, wherein the to-be-measured cell comprises a candidate cell in an active set, there is at least one candidate cell, and the candidate cell preconfigures a resource for the terminal; if the terminal determines, according to the signal measurement value of each cell, that any candidate cell triggers an event 1D, determining the candidate cell that triggers the event 1D as a target cell, reporting a measurement report to the network device, and monitoring the target cell, so that the network device determines, according to the measurement report, the candidate cell that triggers the event 1D as the target cell, and controls the target cell to send a change command to the terminal; if the terminal determines, according to the signal measurement value of each cell, that any cell triggers another intra-frequency measurement event except the event 1D, selecting, according to a preset rule, a specified cell from a candidate cell whose signal measurement value is greater than that of a serving cell, reporting a measurement report to the network device, and monitoring the specified cell, so that the network device determines, according to the measurement report, a target cell from the candidate cell whose signal measurement value is greater than that of the serving cell, and controls the target cell to send a change command to the terminal; and receiving, by the terminal, the change command from the target cell, and using a resource of the target cell to perform serving cell change in the target cell according to the change command, wherein there is one specified cell or multiple specified cells, and the target cell is the specified cell or one of the specified cells. receiving, by a terminal, a measurement control message sent from a network device, and measuring a to-be-measured cell indicated in the measurement control message, to obtain a signal measurement value of each cell, wherein the to-be-measured cell comprises a candidate cell in an active set, there is at least one candidate cell, and the candidate cell preconfigures a resource for the terminal; if the terminal determines, according to the signal measurement value of each cell, that any candidate cell triggers an event 1D, determining the candidate cell that triggers the event 1D as a target cell, reporting a measurement report to the network device, and monitoring the target cell, so that the network device determines, according to the measurement report, the candidate cell that triggers the event 1D as the target cell, and controls the target cell to send a change command to the terminal; if the terminal determines, according to the signal measurement value of each cell, that any cell triggers another intra-frequency measurement event except the event 1D, selecting, according to a preset rule, a specified cell from a candidate cell whose signal measurement value is greater than that of a serving cell, reporting a measurement report to the network device, and monitoring the specified cell, so that the network device determines, according to the measurement report, a target cell from the candidate cell whose signal measurement value is greater than that of the serving cell, and controls the target cell to send a change command to the terminal; and receiving, by the terminal, the change command from the target cell, and using a resource of the target cell to perform serving cell change in the target cell according to the change command, wherein there is one specified cell or multiple specified cells, and the target cell is the specified cell or one of the specified cells.