The present application relates to an under cabinet light interface device and lighting device interface device, the under cabinet light interface device includes: a power input interface, configured to be connected to an under cabinet light power source, so as to acquire an input alternating current from the under cabinet light power source; a power output module, configured to receive, by means of a circuit, the input alternating current from the power input interface, convert the input alternating current into an output current, and output the output current to appliances connected to the power output module; a dimmer detection module, provided between the power input interface and the power output module, and is configured to detect whether a dimmer is connected to the power input interface; and a first switch device, provided between the power input interface and the power output module, and configured to: disconnect a circuit connection between the power input interface and the power output module if the dimmer detection module detects that a dimmer is connected to the power input interface, and conduct the circuit connection between the power input interface and the power output module if the dimmer detection module detects that no dimmer is connected to the power input interface.