A method is provided for remote control. Peripheral component interconnect express (PCI-E) is used for controlling with universal serial bus (USB) type-C (USB-C). A controlling terminal inputs a control signal of switching through a user interface. The controlling terminal transfers the control signal to a PCI-E connector of an image capture unit through a first port. After being handled and transformed by a processing device, the control signal is transferred with a USB-C connector of the image capture unit to at least one controlled terminal through a second port. Thus, the image capture unit is expanded in function to obtain keyboard-video-mouse switch (KVM Switch) among the category of image capturing cards. In summary, with a remote connection, a controlling terminal remotely controls a controlled terminal while simple flow, enhanced speed, and effective cost-down are achieved.