Lighting device and warning system

The invention discloses a lighting device and a warning system. The lighting device comprises a lighting lamp and is characterized by further comprising a communication transceiver, a sensor and a microprocessor, wherein the communication transceiver is used for being communicated with an external unit of the lighting device; the sensor is used for sensing the environment; and the microprocessor is connected with the lamp and used for obtaining the environmental information sensed by the sensor and being communicated with the external unit through the communication transceiver.