A web camera and an operation method thereof are provided. The web camera includes a photographic unit, an infrared (IR) transmitter, a network communication unit and a processing unit. The photographic unit captures an image. The network communication unit establishes a connection with a remote host via a communication network. The processing unit sends the image captured by the photographic unit to the remote host via the network communication unit. The processing unit receives a control command from the remote host via the network communication unit. The processing unit transmits an IR control code corresponding to the control command to a target device via the IR transmitter. The processing unit determines whether the target device responds to the IR control code based on the image.