The modern life in the big city will need special place to do many activities like sport exercise. The modern building which has indoor arena must be very wide and huge. This building in the picture is one of the modern buildings that can be sample to build another one. This building is very wide and huge. This building can be said as the multi function building. The building’s capacity pushes the boundary of Arena design and will eventually establish itself as the world’s largest indoor arena. This building is completed with complete sport tools. The building can be used in the night since the lights of this building are very bright. The form uses simple geometry to create an elegant appearance, while also giving the venue a powerful presence within its setting. The building looks so wonderful and elegant from outside. From the inside, the building looks so wonderful. The arena has been master planned to enable a further 50,000 people to gather at a “live site” outside the arena, to share in major events. With big capacity, this building can be used for world championship events.