A solar air conditioning device (100) comprises a solar collector assembly (30), an inlet assembly (10) at an entrance of the solar collector assembly, and an outlet assembly (50) at an exit of the solar collector assembly. The solar collector assembly includes a heat-absorbing set (31) and a transparent panel (38) being assembled to a top of the heat-absorbing set. The heat-absorbing set comprises a plurality of heat-absorbing units (32) engaged with each other. A distance between the inlet assembly and the outlet assembly is equal to a longitudinal length of single heat-absorbing unit. The heat-absorbing set defines an air channel with the transparent panel and a heat-absorbing channel below the air channel. The inlet and outlet assemblies are in fluidic communication with the heat-absorbing channel.