  One of important directions in superstring theory is to reveal the quantum
nature of black hole. In this paper we embed Schwarzschild black hole into
superstring theory or M-theory, which we call a smeared black hole, and resolve
quantum corrections to it. Furthermore we boost the smeared black hole along
the 11th direction and construct a smeared quantum black 0-brane in 10
dimensions. Quantum aspects of the thermodynamic for these black objects are
investigated in detail. We also discuss radiations of a string and a D0-brane
from the smeared quantum black 0-brane.
