The present invention discloses a PSTN voice and IP video visible telephone device with built-in browser, whose audio and video are respectively transmitted by the PSTN network and IP network. The visible telephone device not only has all functions of the PSTN phone, but also has video communication, remote monitoring, multimedia messages, MMS transmitting and receiving, graphic/audio and video broadcast and Web browsing, and other functions. The visible telephone device has structural features that the device is composed of a PSTN audio processing part and an IP multimedia signal processing part, the voice is separately transmitted by PSTN, and a main control system is composed of a digital media processor DM642, a keyboard/telephone event single-chip EM78806 and an interface control single-chip MC9S12UF32. The single-chip MC9S12UF32 controls the keyboard/telephone event single-chip EM78806 through the serial port, and is connected to the DM642 the HPI interface of the DM642 for exchanging information, wherein, a complex programmable logic device XC9536 provides a time sequence. The operating system is a real-time operating system based on DSP BIOS, the built-in browser and other application programs are developed and operated on the real-time operating system.