Cosmic rays is energetic particles from space. These particles to the lower atmosphere and influence the earth's global electricity and magnetism. Cloud forming can be accelerated by the electricity and cloud thermodynamic. These basic knowledge are used in making correlation analysis between cosmic ray and total cloud/upper cloud cover in the region of Indonesia in the period 1979 to 1995. The analysis of the correlations in this report including total correlation, annual correlation, and the correlation in maximum and minimum solar cycle.