The purpose of this study is to set up a simultaneous equation model to estimate the cross-effects between imported and domestic fruits. The emprical rusults indicate that the elasticity of substitution between fruits for two each are abut 0.31 ~ 1.41 in the short period, however the sbustitution effects have been disminishing in the long run. The evidences for above results show that increasing the quanties of fruits import would have direct impacts on market for domestic fruits.