[en] A two-dimensional (2D) measurement system for FRC plasmas based on spectroscopy and computed tomography has been developed. The features of this system are as follows: (1) fifty chord signals of plasma emission are collected using five ten-channel fiber optic arrays; (2) 2D emission intensity profiles can be reconstructed as a function of time with up to a 0.25 μs resolution; (3) the result has explicit physical meaning with the help of five grating monochromators; (4) the measurement wavelength is tunable over visible and ultraviolet regions, and the bandwidth is also variable (0.2-2nm). The authors first measured a translated plasma at the outlet of the source region in the FIX machine. Typical plasma parameters of the source plasma produced on the FIX machine were total temperature ∼ 200eV, electron density ∼6.4 x 10¹⁵ cm^-3, and a lifetime ∼80μs. The separatrix radius and the length of the plasma were about 4.5 and 70cm, respectively. Five photocollector arrays were placed azimuthally around the z-axis at interval angles of 55 ∼ 65 degree. The result of reconstructing a set of 2D and time-resolved profiles is given. Since the major aim of this measurement, however, is observation of equilibrium profiles, formation, gross instability, plasma end profiles, they are now trying to measure the 2D bremsstrahlung profile at the midplane in the source region. At the same time, they are improving the optical system to increase the sensitivity for future measurements in the confinement region where the plasma density will be at least 100 times lower than in the source. Additionally, a reconstruction technique for a 2D H_β emission profile is being developed