Abstract: A detection method applied to a storage device including transmitting a Devslp command to a signal pin of the storage device; pulling high the voltage level at a control pin of the storage device when a first response corresponding to the Devslp command is received to enable the storage device to enter a sleep mode; pulling low the voltage level at the control pin when a first predetermined period has elapsed; transmitting a Comwake signal to the signal pin; and determining that the sleep mode of the device under test meets a specification when the storage device receives a second response corresponding to the Comwake signal in a second predetermined period.