A modularized lighting device includes a multifunctional module. The multifunctional module includes a module base a top of which is combined with a substrate to house a sensor and a camera lens in a receiving space of the module base. The module base is provided, on the bottom thereof, with a light emission element included light board that is coupled to the module base. Through a plurality of mounting holes, the module base can be mounted in an interior space of a housing of a variety of lighting fixtures/devices to allow a user to selectively use a single function or multiple functions for easy replacement of components of for example the sensor and the camera lens. Thus, the present invention makes use of the multifunctional module to be applicable to various types of lighting devices to achieve the purposes of enhancing convenience and modularized function selection.