Absolute total single-electron-capture cross sections have been measured for low-energy energy O-2(+) + N-2 system in the collision energy range between 0.50 to 2.0 keV. These cross sections are found to be in the range of 0.67 to 2.08 x 10(-16) cm(2). The measured total cross sections for single-electron-capture display a slowly increasing behavior as a function of the incident energy. Several measurements of total cross sections for electron-capture from N-2 by slow N-2(+) and O+ ions, and from O-2 by slow O-2(+) ions presently exist in the literature. In the measurements reported here, we measured the total cross sections for electron-capture from N-2 by slow O-2(+) ions, such measurements are not found in the literature. The increasing availability of data on this system may stimulate work in this direction.