The invention discloses a multifunctional home security device. The device comprises a security cabinet, multiple mounting holes are arranged on the security cabinet, an information processing moduleand a wireless transceiver are arranged in the security cabinet; a processor is arranged in the information processing module; the processor is connected with each of a smoke sensor and a humidity-temperature sensor; the processor is electrically connected with the controller, the controller is electrically connected with a warning device, a loudspeaker of the warning device is arranged on a surface of the security cabinet, and the processor is electrically connected with the wireless transceiver. The device is suitable for use in kitchen and can effectively prevent the kitchen fire disasterand water disaster; and the device still can be used as the daily tool in the kitchen; a sensing result is transmitted to the information processing module through the arranged smoke sensor and the humidity-temperature sensor; the processing integration and reference contrast are performed on the data through the processor in the information processing module, thereby obtaining a processing result; and the warning device can be controlled to start warning through the arranged controller.