Abstract: For "urban disease" problem, such as overcrowding, traffic congestion, environmental pollution, housing difficulties and so on, in order to assess urban situation objectively and quantitatively and find the causes of "urban disease", this paper presents concept of "urban examination" based on spatial big data in spatial information domain. Hoping to play the role of comprehensive, objective and accusation of spatial big data, to evaluate urban in full range is important, such as population, resources, environment, housing, public facilities, road transportation, economic development and urban safety. Its results will provide basic data for governance of "urban disease". In this paper, concept and connotation of "urban examination" is presented firstly, and overall process of "urban examination" is designed, and comprehensive assessment system is established.Finally key technologies to retaliate "urban examination" are described. By the way of "urban examination", to measure the illness degree of urban objectively is the first condition of position of "urban disease".

Key words: urban disease, urban examination, urban situation assessment, spatial big data