Land supervision sampling method and system

The invention discloses a land supervision sampling method and system. The method comprises the steps that land features of idle lands are acquired, wherein the land features include areas and unit prices of lands and purchaser features, and the purchaser features include the quantity of lands purchased by a purchaser and the quantity of idle lands among the lands purchased by the purchaser; land features of non-idle lands are acquired; land features of to-be-sampled lands are acquired; and the probability of idleness of the to-be-sampled lands is calculated according to the land features of the idle lands, the land features of the non-idle lands and the land features of the to-be-sampled lands; and a K-Means clustering analysis method is adopted to perform sampling on the to-be-sampled lands according to the probability of idleness of the to-be-sampled lands. Through the land supervision sampling method and system, the probability of selecting idle lands among the to-be-sampled lands can be improved, and a l