  By focusing on the interchangeable role in a generating function (i.e.,
$\beta \leftrightarrow E$ in the Laplace transform), the superstatistics
proposed by Beck and Cohen can be viewed as a counterpart of the canonical
partition function. Some formal properties of this superstatistics are
presented in connection with thermodynamic structures and information aspects.
For any combination of the local equilibrium statistical factor and the form of
fluctuating field, which are ingredients of making a generic superstatistics, a
variance of the fluctuating quantity appears in the correction term. This fact
enables us to relate parameters contained in the statistical factor with the
variance in {\it any} situation.
