SPOC (2 M in diameter and 3 M in length) can provide a vaccum condition of 10^-8 torr and can provide plasma condition similar to the ionospheric environment. SPOC is Taiwan’s largest space plasma chamber, and is also the second largest space plasma chamber in Asia (second to the chamber in ISAS/JAXA, Japan). SPOC has been used for test and calibration of low energy plasma and neutral instruments as well as electric and magnetic field instruments. SPOC has also been used to study basic space plasma physics, and it can also be used for the development of plasma thrusters.