In this study, the factor to maintain a necessary environmental condition for the socially desirable behaviors of the individuals on the municipality-wide was examined. Five municipalities by which the researcher achieved multiple participation in the human care service were taken up, and participation was advanced in accordance with the behavior consultation model of J. R. Bergan. The target of participation was that various problems in practice were solved by the collaboration of labor of parties concerned, and an effective environment designed. The feature of the interaction with key person was described retroactively as a result at the opportunity to the researcher’s human care service when it got acquainted with participation and key person. Consideration was added from the point of collaboration of labor of the meaning of multiple participation of the researcher and key person to these results. Moreover, the effectiveness of the application of the behavior consultation on both sides of the case and the system was suggested.