Decay behaviors of triplets were investigated as a function of temperature in ternary (water/AOT/oil) and quaternary (water/AOT/cosurfactant/oil) reverse micellar solutions. The triplet species generated by the laser irradiation of tetrasodium pyrenetetrasulfonate dissolved in a reverse micelle were detected by monitoring the triplet-triplet absorption at 430 nm. The observed decay curves were analyzed with the kinetic model combining the intermicellar triplet-triplet annihilation (TTA) with the intramicellar TTA. The kinetic model for the intermicellar TTA process was proposed on the basis of the equilibrium between the monomer and dimer micelles. The obtained kinetic parameters and thermodynamic quantities are discussed in relation to electric percolation phenomena in these micellar systems. A fraction of the dimer micelles was found to be almost constant (0.27 +/- 0.03) at the percolation temperature for all of the reverse micellar systems that were investigated. Furthermore, an average number of triplets per micelle and the Gibbs free energy change for dimer micelle formation seem to be closely related to the percolation threshold. These results suggest that the laser-induced transient absorption spectroscopy of a probe is a useful method for studying dynamic behavior in micellar systems.