A cell measurement method, wherein the method comprises: camping, by a terminal device (102, 200), on a first cell; determining, by the terminal device (102, 200), that the terminal device (102, 200) is in a target environment; obtaining, by the terminal device (102, 200), signal strength of the first cell on which the terminal device camps; performing, by the terminal device (102, 200), measurement on a second cell when the signal strength of the first cell is less than a first threshold and greater than a second threshold, wherein the second cell is a cell determined by the terminal device (102, 200) based on the target environment; when a measurement result of the second cell meets a cell handover condition, switching, by the terminal device (102, 200), a cell on which the terminal device camps from the first cell to the second cell; and performing, by the terminal device (102, 200), measurement on a third cell when the signal strength of the first cell is less than the second threshold, wherein the third cell comprises a neighboring cell of the first cell; wherein the terminal device (102, 200) comprises a first processor and a second processor, wherein the first processor of the terminal device (102, 200) sends a target measurement policy to the second processor of the terminal device (102, 200), the first processor is configured to generate the target measurement policy, and the second processor is configured to execute the target measurement policy; and the target measurement policy comprises at least one of the first threshold, the second threshold, and cell information corresponding to at least one second cell; the second threshold is less than the first threshold, and the cell information corresponding to the second cell comprises at least one of a frequency corresponding to the second cell and a cell identifier corresponding to the second cell. camping, by a terminal device (102, 200), on a first cell; determining, by the terminal device (102, 200), that the terminal device (102, 200) is in a target environment; obtaining, by the terminal device (102, 200), signal strength of the first cell on which the terminal device camps; performing, by the terminal device (102, 200), measurement on a second cell when the signal strength of the first cell is less than a first threshold and greater than a second threshold, wherein the second cell is a cell determined by the terminal device (102, 200) based on the target environment; when a measurement result of the second cell meets a cell handover condition, switching, by the terminal device (102, 200), a cell on which the terminal device camps from the first cell to the second cell; and performing, by the terminal device (102, 200), measurement on a third cell when the signal strength of the first cell is less than the second threshold, wherein the third cell comprises a neighboring cell of the first cell; wherein the terminal device (102, 200) comprises a first processor and a second processor, wherein the first processor of the terminal device (102, 200) sends a target measurement policy to the second processor of the terminal device (102, 200), the first processor is configured to generate the target measurement policy, and the second processor is configured to execute the target measurement policy; and the target measurement policy comprises at least one of the first threshold, the second threshold, and cell information corresponding to at least one second cell; the second threshold is less than the first threshold, and the cell information corresponding to the second cell comprises at least one of a frequency corresponding to the second cell and a cell identifier corresponding to the second cell.