Abstract: This paper presents our investigation on landslide monitoring over last many years.Based on the results of other studies,the paper introduces the system of landslide monitoring. It can monitor geological environments,induced factors and process factor. The induced and process factor are more important in landslide monitoring.The techniques of rain-infiltration-displacement is applied to the landslide monitoring engineering at Hekou sugar refinery factory. The automatic monitoring system can make remote data collection,data transfer,data warehousing. According to the real-time monitoring data,it is concluded that the depth of infiltration was 7 m when the daily rainfall was 67 mm. The depth was more than 7 m and less than 12 m when the 10 daily rainfall was 110 mm. The speed of infiltration was found to 0.53 m d-1 from 0 m to 7 m and was 0.29 m d-1 from 7 m to 12 m in depth.