Abstract: M-S-P (Mountain-Sea-Plain) is a combined construction space in this paper, of which "M" refers to mild slope of low mountains and hills, "S" refers to coastal land, "P" refers to inefficient construction land. This paper focuses on the problem of construction land resource shortage, and brings out an integral optimization allocation model-"M-S-P",which aims at optimizing construction land resource. Using economic development suitability and ecological security evaluation index, this paper allocates the land development scale of Fujian Province in 2020. The results indicate that:1) Economic development suitability evaluated by nighttime lights data manifests significant positive correlation with the inter-annual variation of GDP. 2) By the year 2020, 71.09% of newly increased construction land (approximately 141 000 hectares) will derive from "M", which are concentrated in the middle and western areas of Fujian Province; 28.51% of newly increased construction land (approximately 56 000 hectares) will derive from "P", which is concentrated in the eastern coastal areas; 0.39% of newly increased construction land (approximately 870 hectares) will derive from "S", which is mainly located in Jinjiang City and Dongshan County. "M-S-P" integral optimization allocation model of construction land can reasonably allocate the development space of construction land in mountainous areas.

Key words: construction land, Fujian Province, mountain-sea-plain (M-S-P), optimum allocation, light data