Magnetic sensitive angle sensor is a high performance integrated magnetic sensitive element, the inductive magnetic signal characteristics of non-contact, with microprocessor for a new generation of angle sensor intelligent signal processing is made. Fluxgate sensor is the use of soft magnetic materials, some high permeability (such as slope Mo alloy) as the magnetic core, with it’s together under AC magnetic saturation characteristics of the times and Faraday electromagnetic induction principle of magnetic measuring device. The paper proposes the application of angle sensor and fluxgate sensor in design the smart sensor system. The simulation experiments show that the method is effective to design smart sensor.