We have experienced many natural disasters such as earthquake, flood, Tsunami and so on. It is necessary to develop a new rescue structure to protect from them. We have to consider how to recover a damaged construction or rebuilt up a new type of the rescue system as soon as possible after a disaster because time is very important to save lives after emergency situation. Meanwhile, we have created the optimum truss structures by micro-truss approach with a large degree-of-freedom in computing method. This is good skill to form new design for the objection of a light structure or high stiffness under a condition in mechanics. To design a new emergency bridge which is called as "Mobile Bridge™", we have originally created the formation of the optimization truss by computing mechanics. We realize it is necessary to develop this mobile bridge as soon as possible for next national disaster.