This article would like to rediscover the spatial planning and management of the treaty area in Xiamen(廈門)during the 1840s~1930s. It argues that the Xiamen concession shaped the treaty port by transplanting the modern engineering-science. The author thought that British Empire used the neutralization logic for science and legitimated the social evolution to encroach concessions of the Qing dynasty in the late nineteenth century, and enhanced various interests of colonial acts by controlling knowledge simultaneously. This spatial disposition made geographical desire of colonial imagination be a physical space of political connection and economical dependency and remodeled. The informal colonization was a constructional process of a hidden subject. The Xiamen concession built the colonial discipline based on the method of panopticism. This article will point out the purpose of colonial act aimed on ensuring the hygiene and health of Colonizers in Xiamen concession. In practice, it concerned building colonial modernity by observing, surveying, measuring the statistics of science that was a spatial disposition referring to extended territory of informal empire.