The article presents the results of a study of the relationships between various aspects of the socio-psychological climate of the team and the effectiveness of professional activities. The author also presented a program for harmonizing the socio-psychological climate in the production department of the cadastral chamber and assessed its effectiveness. The socio-psychological climate of a team is understood by the author as a system of relations of its members to the team as a whole. Based on a theoretical analysis of the literature, we have derived the following definition of the socio-psychological climate of an organization’s team: the socio-psychological climate of a team is a relatively stable emotional reflection by members of the organization’s team of the nature of the interpersonal relationships that have developed between them, as well as their attitude to joint activities, determined by micro and macroenvironment and the specifics of the activity itself. For the socio-psychological climate, the past experience of the team, expected results and current activities are of great importance. The socio-psychological climate, therefore, is based on interpersonal relationships and, accordingly, is an indicator of their condition. Creating a favorable socio-psychological climate is a constant, systematic, systematic work of the organization’s leaders, work team managers, ordinary employees and psychologists in the organization. We also considered such a parameter as the effectiveness of professional activities. This concept is considered by A.K. Markova, on whose theoretical concept we relied, as a correlation between objective and subjective characteristics of work activity. The objective ones were subject-specific and technological performance indicators that can be observed and recorded in the process of work and which can be assessed based on the results of the activity itself. Purely psychological indicators of effectiveness, which have a personal meaning for a person and are expressed in the attractiveness of work, acted as subjective ones. One of the leading subjective criteria for the effectiveness of professional activity is satisfaction with this activity, as an opportunity to satisfy basic needs in it. The article presents a program for harmonizing the socio-psychological climate in the production department of the cadastral chamber, and describes the results of assessing its effectiveness.