Building block type circuit board

The invention discloses a building block type circuit board which comprises a universal bottom plate with a controller and N functional module circuit boards. The universal bottom plate with the controller comprises an area with an AD function, an area with UART serial port communication and an input and output area. Each functional module circuit board comprises an analog quantity module, a communication function module and a switching quantity input and output module. The analog module is connected with the universal bottom plate with the controller through the area with the AD function. Thecommunication function module is connected with the universal bottom plate with the controller through the area with UART serial port communication. The switching value input and output module is connected with the universal bottom plate with the controller through the input and output area. Various functional modules can be welded on the universal bottom plate through different combinations according to different requir