Let B2 be the unit ball of 2-dimensional complex plane C2, dμα(z) = dm(z)(α>-1) the weighted measure. From the view point of the Cauchy-Riemann operator and the triangle polynomial given in [1], we obtain an or thogonal decomposition and orthogonal basis, where A0(+,+) and A0(-, -) are the Bergman and anti-Bergman spaces respectively. This decomposition can be extended to L2(Bn, dμα(z)). In addi tion, we also obtain some results for Hankel type operators.