Abstract: The tourist organization of the International Horticultural Expo will deeply reflect the ‘green’ Expo. In this paper, we focus on characteristic of the Expo, according to the related research and practical survey, propose an organization solution. On the basis of artificial neural network, regard the tourist flow as electric current, the sight spot as exciting point. Firstly, figure out the occupant density, construct standard ρk and the density curve. Then draw the tourist exciting curve by questionnaire and statistic. Finally, design the solution based on changing the exciting point and exciting degree.