The invention discloses a digitalized indoor unit and an intelligent household security system comprising the digitalized indoor unit, wherein the digitalized indoor unit integrates visual talkback, home furnishing and security and is convenient in mounting and use and lower in cost. The intelligent household security system comprises a management center machine, an exchange machine, the digitalized indoor unit, a digitalized outdoor unit, an intelligent household network converter, a controlled terminal, a router and a power supply device, wherein the digitalized indoor unit and the digitalized outdoor unit are connected with the management center machine through the exchange machine, the intelligent household network converter and the controlled terminal are connected with the digitalized indoor unit, the router is in communication connection with the intelligent household network converter and the power supply device is respectively connected with the digitalized indoor unit and the digitalized outdoor unit electrically. The digitalized indoor unit comprises a master control CPU (central process unit), a display unit, a microphone, a loudspeaker, a key control unit, a video and audio process unit, a storage unit, an Ethernet interface unit, a wireless communication transceiving unit, a master control CPU management and configuration module, a household security control module, a home appliance control module and a talkback visual control module, wherein the display unit, the microphone, the loudspeaker, the key control unit, the video and audio process unit, the storage unit, the Ethernet interface unit and the wireless communication transceiving unit are connected with the master control CPU. The digitalized indoor unit can be widely applied to the field of intelligent household systems.