Model systems, if applied appropriately, give useful and rapid predictions of the potential distribution and population dynamics of the target species. Insect populations are poikilothermal animal and readily applied to model systems in several ways. Classical insect population models are focused on management purposes, for example, prediction of first occurrence period after cold weather season. Insect populations are distributed neither uniformly nor at random, or they are aggregated in patches, or they form gradients of other kinds of spatial structures which are closely related to their natural resources. Thus, developing insect population models should be considered not only with their physiological development and/or occurrence but also with their spatial distributions including their hosts. In this study, we discuss spatial distribution model of insect population with their host in order to future climate change scenario in Korea.