A nail lamp includes an inner casing including an inner shell and an inner chamber enclosed by the inner shell, wherein the inner chamber has an opening; a light emitting module disposed on an inner surface of the inner shell and facing the inner chamber; a control module disposed on the inner shell and electrically connected with the light emitting module; an outer housing hooding the inner casing, revealing the opening; and a touchscreen module or an ordinary screen module disposed on the outer housing and electrically connected with the control module with the touchscreen or screen thereof exposed to the exterior. An option menu is programmed in the operating interface of the touchscreen module beforehand. The user directly uses her/his finger to select an option from the option menu. The touchscreen or ordinary screen can further display the information the related parties intend to present.