A modularized wireless signal receiver includes a plurality of function modules. Each of the function modules is detachably connected another one of the function modules through a transmission line set. The function modules include: an application module, a main control module and a battery module. The main control module includes a wireless communication element electrically coupled to the application module. The wireless communication element is configured to receive a wireless signal and control an operation of the application module accordingly. The battery module includes a battery, and the battery module is electrically coupled to the application module and the main control module. The battery module is configured to provide power to the application module and the main control module.