Abstract: A method of using information dimensions to analyse the spatial structure of systems of towns is put forward in this paper. The urban system in North Henan Province is taken as an example to illustrate how to measure the information dimensions and the f(a) singularity spectrum of multifractals. An analysis of numerical values is made to bring to light the problems existing in the system and some preliminary plans of improving the system structure are presented to show the train of thought of applying fracta...