The human settlement environment is a dynamic subsystem where people live and
produce in the social system. This paper aims at evaluating comprehensively
the suitability state of a given human settlement environment in a certain
time and space and its evolutionary trend, the set pair analysis theory and
its connection numbers are introduced into the suitability evaluation, and
the set of human settlements is established. The set pair analysis (SPA)
model based on partial contact number is used to assess the suitability
status and the development trend of human settlements in Guizhou Province
from 2014 to 2017. The result shows that the SPA model has the features of
convenience, impersonality and good feasibility.