In order to adapt to the variability,dynamicalty and complexity of the monitor objects on the cloud compu -ting environment ,we presents a resource monitor platform for cloud computing environment .The platform is divided into user interface layer, data analysis and resource optimized dispatching layer , monitor management layer ,moni-tor kernel layer and low-level utilities layer .We introduce the function of each layer in detail , and discuss the key technology of monitor method based on event and rule ,and the loosely coupled monitor components for cloud com-puting,and we illustrate primary...