In this thesis, we introduce black hole and its thermodynamics. Then we study black hole solutions of 2D dilaton gravity model and their thermodynamics. We consider effects of the quantum corrections of this model on thermodynamics of the black holes too. Finally, we investigate effect of two additional dimensions on Schwarzschild black hole, when extra dimensions are 2D torus. We get conclude that Schwarzschild black hole does not change in the presence of spherical symmetry; but the reduction provide a boundary term that may play some role in the black hole entropy. Key Words Black Hole, Black Hole Thermodynamics, Extra Dimensions.