A method for turning on an air conditioner, comprising: acquiring (202, 302, 402) a sensor parameter collected by a sensor in a wearable device; determining (204, 404) a physiological parameter based on the sensor parameter; determining (206, 310, 406) a change in a sleep state of a user corresponding to the wearable device based on the physiological parameter, the sleep state at least comprising a deep sleep state and a light sleep state; detecting (208, 312, 408) whether the change in the sleep state is in conformity with a predetermined condition, the predetermined condition comprising a transition from the deep sleep state to the light sleep state; and turning (210, 314) on the air conditioner for heating when the change in the sleep state is detected to be in conformity with the predetermined condition, characterized in that the method further comprises: determining a predetermined time period t 1 during which the user is in the light sleep state, comprising: acquiring historical sleep state information including every time period during which the user is in the light sleep state; and determining an average time period of every time period during which the user is in the light sleep state as t 1; and wherein the step of turning (210, 314) on the air conditioner for heating comprises: turning on the air conditioner for heating immediately when the change in the sleep state is detected to be in conformity with the predetermined condition in the case of t 1 ≤ t 2; turning on the air conditioner for heating after a time period (t 1 - t2) from the change in the sleep state being detected to be in conformity with the predetermined condition in the case of t 1 > t 2, wherein t 2 represents a predetermined time period during which a room temperature is heated to a predetermined temperature by the air conditioner. acquiring (202, 302, 402) a sensor parameter collected by a sensor in a wearable device; determining (204, 404) a physiological parameter based on the sensor parameter; determining (206, 310, 406) a change in a sleep state of a user corresponding to the wearable device based on the physiological parameter, the sleep state at least comprising a deep sleep state and a light sleep state; detecting (208, 312, 408) whether the change in the sleep state is in conformity with a predetermined condition, the predetermined condition comprising a transition from the deep sleep state to the light sleep state; and turning (210, 314) on the air conditioner for heating when the change in the sleep state is detected to be in conformity with the predetermined condition, characterized in that the method further comprises: determining a predetermined time period t 1 during which the user is in the light sleep state, comprising: acquiring historical sleep state information including every time period during which the user is in the light sleep state; and determining an average time period of every time period during which the user is in the light sleep state as t 1; and wherein the step of turning (210, 314) on the air conditioner for heating comprises: turning on the air conditioner for heating immediately when the change in the sleep state is detected to be in conformity with the predetermined condition in the case of t 1 ≤ t 2; turning on the air conditioner for heating after a time period (t 1 - t2) from the change in the sleep state being detected to be in conformity with the predetermined condition in the case of t 1 > t 2, wherein t 2 represents a predetermined time period during which a room temperature is heated to a predetermined temperature by the air conditioner. determining a predetermined time period t 1 during which the user is in the light sleep state, comprising: acquiring historical sleep state information including every time period during which the user is in the light sleep state; and determining an average time period of every time period during which the user is in the light sleep state as t 1; acquiring historical sleep state information including every time period during which the user is in the light sleep state; and determining an average time period of every time period during which the user is in the light sleep state as t 1; and wherein the step of turning (210, 314) on the air conditioner for heating comprises: turning on the air conditioner for heating immediately when the change in the sleep state is detected to be in conformity with the predetermined condition in the case of t 1 ≤ t 2; turning on the air conditioner for heating after a time period (t 1 - t2) from the change in the sleep state being detected to be in conformity with the predetermined condition in the case of t 1 > t 2, turning on the air conditioner for heating immediately when the change in the sleep state is detected to be in conformity with the predetermined condition in the case of t 1 ≤ t 2; turning on the air conditioner for heating after a time period (t 1 - t2) from the change in the sleep state being detected to be in conformity with the predetermined condition in the case of t 1 > t 2, wherein t 2 represents a predetermined time period during which a room temperature is heated to a predetermined temperature by the air conditioner.