The invention discloses a three-network integrated dual-mode intelligent set top box. The three-network integrated dual-mode intelligent set top box is characterized by comprising a central processing unit, an AndroidDVB processing module, an intelligent card, a memory, a signal processing module, a camera, an audio and video input and output module, a tuner, a communication module and a network module, wherein the AndroidDVB processing module, the intelligent card, the memory, the signal processing module, the camera and the audio and video input and output module are connected with the central processing unit, the tuner is connected with the AndroidDVB processing module, and the communication module and the network module are connected with the signal processing module. The three-network integrated dual-mode intelligent set top box is compatible with traditional digital television direct transmission, on-demand unicast and other services and meanwhile has the network video playing, video call, game entertainment, family networking and other functions, and is suitable for efficiently developing data and internet services, capable of meeting three-network integrated service requirements, wide in application range and high in practicality.