Using the data of medical services in the past seven years, we have found that computer technology and media convergence in medical design has become increasingly complex and diverse, design plays an increasingly limited role in this context. Base on Richard Buchanan's theory, this paper divides the systems into four parts: Arrangement, Set, Group, and Condition, Which summarizes the problem of communication in healthcare services as a systemic problem from the perspective of condition. Therefore, We attempted to develop a new design model of an IP-based communication system for children patients, the parents and the doctors. To make further understanding and reconstruct the design model of computer technology and media convergence in children's healthcare services, so as to provide new thoughts for further discussion and practice in this paper.