The system comprises a digital visual intercom indoor intelligent gateway extension control system, which comprises a system functional module, a gateway extension functional module, a control system platform, a control system networking module and a system operation mode. An indoor extension circuit part adopts a hardware bottom layer based on a Cortex architecture, integrates a digital wireless ZigBee module and switching value input, and adopts an open Android 4.2 system in an application layer. The system functional module comprises a control module, a system setting module, a security protection module, a visual intercom module, a ZigBee intelligent home module, a WiFi module and an RS485 module. The control module performs comprehensive control and operation on the operation of an intelligent control system through the control system platform and built-in control software. The digital visual intercom indoor intelligent gateway extension control system is pure digital visual equipment, and has the advantages of good compatibility, high anti-interference performance by networking in a topological manner, low construction investment and cost, stable operation of a security protection system, and low use and maintenance costs.