Abstract: With the data of monthly mean temperature at 155 stations in West China, SST of Pacific Ocean from 1961 to 1990 and Empirical Orthogonal Function method, this work analyzed the spatial and temporal features of seasonal mean temperature in West China and the relationship between West China temperature and SST of Pacific Ocean on the basis of temperature comparison in El Nino and La Nina years. Results show that eigenvectors and temporal coefficients from the EOF expansion may properly reflect the spatial and temporal features of the temperature anomalies in West China. It also presents that El Nino and La Nina years have opposite temperature anomalies in West China (except for winter), namely, warmer (colder) areas in El Nino years correspond to colder (warmer) areas in La Nina years. The seasonal SST anomaly of the West Pacific can affect the temperature variation of winter in West China (such as the summer SST can affect the autumn temperature, and the winter SST can affect the temperature of the following spring). The temperature variation of summer can affect the SST of summer, autumn, and winter while the winter temperature can affect the SST of the following spring.