[en] The synchronous low altitude wind, temperature and surface wind field observation experiments were carried out at 3 sites (Phase I. II. III) for 20 days and 10 days respectively during Sep. and Oct. 1995 and in Feb. 1997 in order to provide basic data to EIR for feasibility study and design stages of Qinshan NPP (Phase III). An experimental and theoretical study on estimation of annual atmosphere diffusion factor is described for new site by using ethical one full year of hourly meteorological observation date for operated NPP based on meteorological correlation experiment. The possibility of wind tunnel correlation simulation test by using PIV technology instead of synchronous field observation experiment was also studied