Abstract: A solar cell-bearing roof comprising a roof base member provided on a partition wall which partitions a building into an indoor portion and an outdoor portion, a solar cell module provided on said roof base member, and an electric wiring whose one end portion being electrically connected with said solar cell module, wherein the remaining end portion of said electric wiring is drawn to the outside from between said roof base member and said solar cell module and at an outdoor-sided position than an indoor side face of said partition wall. An execution method for installing said solar cell-bearing roof. A power generation system and a building in which said solar cell-bearing roof is used.