The utility model relates to a multifunctional internet long-range monitoring system of petroleum drilling well, comprising at least two well teams video and audio, a data acquisition monitoring network and a monitoring data centre network of the exploration drilling head office. Each well team video and audio and the data acquisition monitoring network are connected with the internet in a lineless way; the monitoring data centre network of the exploration drilling head office is connected with the internet in a line way. The well team video and audio and the data acquisition monitoring network consist of a modulating demodulator, a router, a comprehensive multiplexing server, a video-frequency service device, a video encoder, a voice gateway and a comprehensive logging instrument. The monitoring data centre network of the exploration drilling head office is composed of a modulating demodulator, a router, a comprehensive multiplexing server, a video-frequency service device, a video encoder, a voice gateway. The beneficial effect of the utility model is that the utility model makes full use of the internet source and combines the remote video monitoring and commanding, voice, data transmission and other functions together so the utility model can completely satisfy the functional requirements of petroleum drilling well.