We could analyze the performance of the co-existence network of WiMAX and WiFi through existing OPNET simulation models and the network was performing as anticipated. The data traffic received and delays were measured. Undeniably the advantages of WiMAX technology in some areas are quite obvious, but the difficulties it faced indeed hindered its further development. If WiMAX wants to continue to develop, it must be redeployed and make a reasonable plan for its market positioning. According to Kamali et al. (2012) WiMAX enables low cost mobile access to the Internet and provides integrated wireless fixed and mobile services using single air interface and network architecture. But the place of WiFi cannot be replaced in the recent years. The better development of WiMAX will be to consider how to coexist with WiFi (Arlene, 2012). Like the deployment picture in this paper, using these two technologies can achieve a better coverage of wireless networks. WiMAX has moved into a bottleneck position that could not be avoided. Because the mobile operators are gradually moving to LTE market, WiMAX had to face enormous challenges. At the same time, this gave WiFi a lot of space to continue the development. Undeniably WiMAX has advantages in some areas, but it still faces the risk of being acquired. WiMAX should pinpoint its location, find the appropriate development of the market, and think of better coexistence with WiFi.