There is a good correlation between anomalous Schumann resonance and seismic activities. Pre-earthquake Schumann resonance anomaly is an important manifestation of LAIC (Lithosphere-Atmosphere-Ionosphere Coupling), which is probably connected with seismic ionospheric disturbance. The system parameters and research results of statistical and seismic case analysis observed in Yunnan Schumann resonance monitor stations are introduced in this paper. Three days before the Yingjiang M5.8 earthquake on March 10, 2011, the component of Yongsheng station showed anomalous Schumann resonance. Two days before the Lincang M4.0 earthquake on January 23, 2011, there appeared familiar anomalous Schumann resonance in the By component of the same station. In the case of the Honghe M4. 2 earthquake on May 22, 2011, spectrum analysis results of Tonghai station on the same day displayed strong spectral density disturbances on the first three Schumann resonance frequencies. Research shows that Schumann resonance monitor is a feasible seismic electromagnetic precursory monitor method.