Abstract: This talk aims to help researchers in astronomy, space science and engineering understand space economy and the future direction of space exploration from an economical aspect. We will overview the current and future space economy including satellite services, space tourism, and space mining. Then we will examine the NASA commercial space program in the Low Earth Orbit (LEO), the Moon and the Deep Space. To understand the LEO space economy, we will look into NASA’s Commercial Orbital Transportation Services (COTS), Orbital ATK and SpaceX commercial resupply services contracts, and commercial activities at the International Space Station. To understand the space economy in the Moon and the Deep Space, we will exam the NASA Commercial Lunar Payload Services (CLPS), and the commercial partnerships for the Moon and Mars Technologies.