A broadcasting system with auto programming and viewer number feedback is provided, which includes a data gathering device, a viewer number calculating device and a program auto-scheduling device. The data gathering device is used to gather a program list and a local viewer number data. The viewer number calculating device is used to calculate a local viewer number. The program auto-scheduling device is used to automatically determine whether to adjust a program schedule of the program list according to a comparison result between the local viewer number and a determined viewer number. Therefore, the broadcasting system of the invention can detect viewer and definitely calculate viewing efficiency within a predetermined status, and can precisely quantify the viewing efficiency using the caught data. Additionally, the broadcasting system of the invention can automatically evaluate whether to reschedule of a program according to the data feedback to conform the predetermined viewer status.