To provide a conference system for easily matching sight lines of conference participants and to provide a control method of the conference system and a program.

Since an imaging apparatus 3 is positioned in a substantially center of a screen 2, which is within a projection range of a projector 1, the imaging apparatus 3 can image a conference participant M from a front face, and can match the sight lines of the conference participants M. In such a structure, the imaging apparatus 3 receives light projected from the projector 1. Thus, the conference participant is imaged darkly with an automatic exposure function of the imaging apparatus 3. Consequently, luminance of a position of the imaging apparatus 3 (imaging lens 3a) is dropped in the projected image so that the position of the imaging apparatus 3, namely, the position of a transmission section 2c of the screen 2 is not irradiated with light from the projector 1 in the embodiment.