  In this paper, we investigate how to measure the intelligence of systems
under specific structures. Two indicators are adopted to characterize the
intelligence of a given structure, namely the function diversity of the
structure, and the ability to generate order under specific environments. A
measure of intelligence degree is proposed, with which the intelligence degree
of several basic structures is calculated. It is shown that some structures are
indeed "smarter" than the others under the proposed measure. The results add a
possible way of revealing the evolution mechanism of natural life and
constructing life-like structures with high intelligence degree.
