With the methodology of AHP, this paper focuses on communication activities and their constituents in city parks, selecting 11 constituents, natural or artificial, and establishes an evaluation model on the basis of the analysis of the characteristics of tourists’ communication activities in order to obtain the weight and order of importance of the constituents of communication activities space. First-grade indicators influence weight and the order of the constituents of communication activities space are: artificial constituents (0.6614) > natural constituents (0.3386) . The weight and order of five secondary indicators attached to natural constituents: private space (0.1538) > shade tree (0.0955）> gentle slope mound (0.0474) > beautiful waterscape (0.0270) > sunshine lawn (0.0149); the weight and order of six secondary indicators attached to artificial constituents: field boundary (0.2865) > Leisure chairs（0.1843）> resting areas (0.0795) > appropriate square (0.0533) > tree-lined road (0.0352) > landscape sketch (0.0227).Using modern decision analysis methodology to research the relationship of environment constituent elements has great theoretical and practical significance for the scientific design and construction of suitable environment for human needs.

Abstract
 1. Introduction
 2. Materials and Methods
  2.1. Investigation methodologies
  2.2. Analysis methodologies
 3. Results and Discussions
  3.1. Communication activities’ type and preferenceof tourists
  3.2. Space constituent analysis of communicationactivity in park
 4. Conclusions
 References

• Hong Lv(Department of Horticulture Environmental, College of Horticulture Science and Engineering, Shandong Agricultural University, Department of Art and Design, Shandong University of Science and Technology)
• Tae-Dong Cho(Department of Environmental Landscape Architecture, Gangneung-Wonju National University) Corresponding author
• Yong-Ji Piao(Department of Horticulture Environmental, College of Horticulture Science and Engineering, Shandong Agricultural University)