The invention relates to a network camera based on an internal digital interface, which is characterized in that the digital signal output end of a CCD (Charge Coupling Device) image sensor module is correspondingly connected with the signal input end of a multimedia application processor; the first signal input/output end of the multimedia application processor is correspondingly connected with the signal output/input end of an audio codec; the second signal input/output end of the multimedia application processor is correspondingly connected with the signal output/input end of a network controller; and the third signal input/output end of the multimedia application processor is correspondingly connected with the signal output/input end of an alarm controller. The network camera has the advantages of directly adopting the digital interface of the CCD sensor module and avoiding signal loss generated when an analog video and a digital video are converted in the design of the common network camera, images can achieve D1 (720*576) format resolution and can be transmitted on network, and video signals, audio signals and alarming control signals can be transmitted through the network at the same time.