In this paper, we propose a hybrid communication architecture through the integration of network and field models. The architecture is based on the spatial information field model that is defined in a four dimensional time-space, and consists of numbers of independent IAs (intelligent agents). Each IA has 7 different communication and information processing patterns. Through different space allocation and physical combination of network and field communication modes of N IAs, we construct a four dimensional and time-related spatial information field (SIF) model, which is a dynamic system and does not have any central control unit. By using the SIF model, the communication mechanism in terms of information processing is discussed using the modern global war simulation concept as an example. The discussion concludes that the proposed architecture can provide a unified solution for the current different communication models and methods.