A Discontinuous Reception, DRX, method, comprising: determining, by a terminal device, a first service type, wherein the first service type is a service type of a service which is being transmitted between the terminal device and a network device; determining, by the terminal device, a first length according to the first service type; and determining, by the terminal device, the first length as a length of a timer for DRX of the first service type; wherein the timer is at least one of following timers: an on-duration timer, a DRX inactivity timer, a Hybrid Automatic Repeat reQuest, HARQ, Round Trip Time, RTT, timer and a DRX retransmission timer, wherein, under a condition that the timer is the DRX inactivity timer, the HARQ RTT timer or the DRX retransmission timer, at least one service type corresponds to at least one HARQ process Identifier, ID, characterized in that, determining, by the terminal device, the first length according to the first service type comprises: determining, by the terminal device, a first HARQ process ID according to the first service type, wherein the first HARQ process ID is configured to represent a HARQ process ID corresponding to data transmission; and determining, by the terminal device, the first length according to the first HARQ process ID, wherein determining, by the terminal device, the first length according to the first HARQ process ID comprises: determining, by the terminal device, the first length according to the first HARQ process ID and a second mapping relationship, wherein the second mapping relationship is configured to represent a corresponding relationship between the at least one HARQ process ID and the at least one timer length section, and the at least one HARQ process ID comprises the first HARQ process ID; or determining, by the terminal device, the first length according to the first HARQ process ID and a third mapping relationship, wherein the third mapping relationship is configured to represent a corresponding relationship between the at least one HARQ process ID and t, t is a predetermined time parameter in the third mapping relationship and t is larger than 0, and a product of the first HARQ process ID and t is determined as the first length. determining, by a terminal device, a first service type, wherein the first service type is a service type of a service which is being transmitted between the terminal device and a network device; determining, by the terminal device, a first length according to the first service type; and determining, by the terminal device, the first length as a length of a timer for DRX of the first service type; wherein the timer is at least one of following timers: an on-duration timer, a DRX inactivity timer, a Hybrid Automatic Repeat reQuest, HARQ, Round Trip Time, RTT, timer and a DRX retransmission timer, wherein, under a condition that the timer is the DRX inactivity timer, the HARQ RTT timer or the DRX retransmission timer, at least one service type corresponds to at least one HARQ process Identifier, ID, characterized in that, determining, by the terminal device, the first length according to the first service type comprises: determining, by the terminal device, a first HARQ process ID according to the first service type, wherein the first HARQ process ID is configured to represent a HARQ process ID corresponding to data transmission; and determining, by the terminal device, the first length according to the first HARQ process ID, determining, by the terminal device, a first HARQ process ID according to the first service type, wherein the first HARQ process ID is configured to represent a HARQ process ID corresponding to data transmission; and determining, by the terminal device, the first length according to the first HARQ process ID, wherein determining, by the terminal device, the first length according to the first HARQ process ID comprises: determining, by the terminal device, the first length according to the first HARQ process ID and a second mapping relationship, wherein the second mapping relationship is configured to represent a corresponding relationship between the at least one HARQ process ID and the at least one timer length section, and the at least one HARQ process ID comprises the first HARQ process ID; or determining, by the terminal device, the first length according to the first HARQ process ID and a third mapping relationship, wherein the third mapping relationship is configured to represent a corresponding relationship between the at least one HARQ process ID and t, t is a predetermined time parameter in the third mapping relationship and t is larger than 0, and a product of the first HARQ process ID and t is determined as the first length. determining, by the terminal device, the first length according to the first HARQ process ID and a second mapping relationship, wherein the second mapping relationship is configured to represent a corresponding relationship between the at least one HARQ process ID and the at least one timer length section, and the at least one HARQ process ID comprises the first HARQ process ID; or determining, by the terminal device, the first length according to the first HARQ process ID and a third mapping relationship, wherein the third mapping relationship is configured to represent a corresponding relationship between the at least one HARQ process ID and t, t is a predetermined time parameter in the third mapping relationship and t is larger than 0, and a product of the first HARQ process ID and t is determined as the first length.