Chalcogenide glasses (ChGs) have unquestionably become the most widely used materials in the field of electronics, medicine, detection etc. ChGs are being actively studied to enhance their future uses. Among many of their magnificent properties is the thermoelectric (TE) property which is attracting many researchers towards these materials. By implementing advanced nanoscience and nanotechnology, numerous fresh TE materials with high figure of merit (ZT) are produced. This is particularly true for materials based on metal chalcogenides, which among all the various types of thermoelectric materials have relatively high ZT and low cost. In the present work, we have summarized the main parameters which decides whether the material is suitable for TE applications or not like Seebeck Coefficient (S), electrical conductivity (σ) and power factor (P) for various systems.