In one embodiment, a smartwatch includes a processor and a memory storing instructions to be executed in the processor. The instructions are configured to cause the processor to obtain input comprising voice information; determine whether the voice information comprises interrogative keyword; and determine that the voice information is interrogative information in response to determining that the voice information comprises interrogative keyword. The instructions are configured to cause the processor to determine whether reply information corresponding to the interrogative information can be obtained from a memory of the smartwatch; and send the interrogative information to a server through a wireless network in response to determining that the reply information corresponding to the interrogative information cannot be obtained from the memory of the smartwatch. The instructions are further configured to cause the processor to receive reply voice information sent by the server, and play the reply voice information.