In this paper, a multifunction radar system architecture has been introduceed. Multifunction radar is a phased array radar system. A phased array radar system can adapt its parameters on a near-instantaneous basis according to the way in which it perceives its operating environments. This allows the combination of function such as tracking, surveillance, and weapon guidance, which were traditionally performed by dedicated individual radars. Multifunction radar has clear advantages of being able to instaneously and adaptively position and control the beam, but it also brings a new set of challenges. Radar resource management is the problem of how to allocate finite available resources in an optimal way to carry out a chosen mission.