Results obtained from the experiment conducted to determine the potential distribution of greenhouse white flies are summerized as follows; Hatching rate of eggs were significantly decreased when eggs were treated under $-5^{circ}C$ for three days and no eggs were hatched when 4he eggs were treated at $10^{circ}C$. for three days. Kate of pupation was also decreased when larvae were subjected to $-5^{circ}C$ for three days and no pupation of larvae was of served when the larvae were under $-20^{circ}C$ for three days. Emergency rate of pupae was decreased when pupae were under $-20^{circ}C$. for three days and no emergence was observed when pupae were treated at the temperature of $-20^{circ}C$ for three days. Survival rate of adults were greatly decreased when they were under $-7.5^{circ}C$. for three days and the adults were completely dead when they were subjected to $-10^{circ}C$. for three days. Therefore, it may be concluded that the greenhouse white flies may be overwintered, in the from of pupae at the middle-southern part of Korea, while they may overwinter in all developmental stages in Jeju Island and in southern tip coast area of Korea.