  We study the canonical quantum theory of the Reissner-Nordstrom-de Sitter
black hole(RNdS). We obtain an exact general solution of the Wheeler-DeWitt
equation for the spherically symmetric geometry with electro-magnetic field. We
investigate the wave function form a viewpoint of the de Broglie-Bohm
interpretation. The de Broglie-Bohm interpretation introduces a rigid
trajectory on the minisuperspace without assuming an outside observer or
causing collapse of the wave function. In our analysis, we obtain the boundary
condition for the wave function which corresponds to the classical RNdS black
hole and describe the quantum fluctuations near the horizons quantitatively.
