We propose here a multichannel theory on inverse two-electron recombination processes (i.e., inverse resonance radiative-recombination processes). As a specific example, we analyze the recent high-resolution laser spectroscopic measurements on excited barium atoms by Safinya and Gallagher, illustrating that accurate experimental spectroscopic data can be utilized to assess the accuracy of theorectical calculations on inverse two-electron recombinations. Through the detailed balance relation, it is equivalent to assess the accuracy of theoretical calculations on two-electron recombination processes- this will be a more basic test on theoretical results for eachappropriate symmetric block in partial-wave expansions.