We define the quantum exterior product boolean AND(h) and quantum exterior
differential dh on Poisson manifolds. The quantum de Rham cohomology, which
is a deformation quantization of the de Rham cohomology, is defined as the
cohomology of d(h). We also define the quantum Dolbeault cohomology. A ver
sion of quantum integral on symplectic manifolds is considered and the corr
esponding quantum Stokes theorem is stated. We also derive the quantum hard
Lefschetz theorem. By replacing d by d(h) and boolean AND by boolean AND(h
) in the usual definitions, we define many quantum analogues of important o
bjects in differential geometry, e.g. quantum curvature. The quantum charac
teristic classes are then studied along the lines of the classical Chern-We
il theory. The quantum equivariant de Rham cohomology is defined in the sim
ilar fashion.