NOVELTY - The sunlight projects into an all-direction collecting surface (110) of the spherical, air-inflatable collection frame (100) at all times. The collecting surface is formed of aligned collecting cells comprising Fresnel lens. The radiation of the sunlight is converged at the focal point (120) defined within the collecting surface. A concaved reflection surface below the collecting surface reflects sunlight towards the focal point. A radiation collector is supported at the focal point of the collection frame for collecting the radiation. The solar energy is converted into heat.    USE - Device for concentrating sunlight and converting it into desired power that is used for outdoor lighting, providing a solar grill, small amount electricity generation, large amount power generation, providing a roof structure, providing a wall structure, sea water desalination, water purification, biofuel production, and hydrogen extraction in a building. Can also be used for supplying portable power and heat to a car or a boat.    ADVANTAGE - The device can be conveniently applied in different locations for different functions. It can be placed on the roof and outer wall of buildings. A versatile and aesthetic appearance can be provided. The device can be simply placed on the roof of the building without changing the original structure, or just be placed on the ground. Electricity, light, and heat are provided to the building. This results in savings on the energy consumption. The device structure is simple and lightweight. It won't take too much load of a mobile carrier such as a car or a boat. The collection of sunlight from all directions won't limit the movement of these carriers. The efficiency for energy conversion is increased due to concentration of sunlight. The absence of any motional element increases the reliability.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a ball structure of the device for concentrating sunlight with Fresnel lenses.    Collection frame (100)    Collecting surface (110)    Focal point (120)    Lens face (131)    Reflective dish (301)