  We present a general framework to study the phase transition of a black hole.
Assuming that there is a phase transition, it is shown that without invoking
any specific black hole, the critical exponents and the scaling powers can be
obtained. We find that the values are exactly same which were calculated by
taking explicit forms of different black hole spacetimes. The reason for this
universality is also explained. The implication of the analysis is -- one does
not need to investigate this problem case by case, what the people are doing
right now. We also observe that these, except two such quantities, are
independent of the details of the spacetime dimensions.
