Abstract:The one-dimensional series(1-D series) method was proposed to analyse the population spationtemporal structure. It included one-dimensional series sampling method,single population spatial structure analysis,space-time correlation analysis,and the relationship between space-time analysis and population dynamics forecasting. The result of pine caterpillar(Dendrolimus punctatus W. )sturcture analysis indicated that 1-D series method is much better than classical spatial pattern index methods, the space-time analysis result indicated that 1-D series method is also suitable for analysing population dynamics-spatial diffusion.