Intelligence tasks in intelligence analysis show diversity in type,and the intelligence tasks of different fields and organizations are focused and specific in scenarios and objectives.The intelligence tasks have the characteristic,also have some commonness.Summarizing the law of many intelligence tasks can help the intelligence analyst better understand the intelligence demand and choose the appropriate data and methods.Firstly,this paper combs the relationship between intelligence task and intelligence demand,and summarizes the characteristics of intelligence tasks in research purpose,analysis process,subject structure and research field,and explains these characteristics by analyzing the tasks of three kinds of intelligence topics,such as analysis of research status in the field,competitiveness evaluation and patent information analysis.