A solar cell system making method includes steps of making a round P-N junction by (a) stacking a P-type silicon layer and a N-type silicon layer on top of each other, and (b) forming a P-N junction near an interface between the P-type silicon layer and the N-type silicon layer; cutting the round P-N junction into a plurality of arc shaped solar cell preforms; forming an arc shaped surface by stacking the plurality of arc shaped solar cell preforms along a first direction and forming an electrode layer between each adjacent two of the plurality of arc shaped solar cell preforms; and forming a first collection electrode and a second collection electrode to form an arc shaped solar cell system having a photoreceptive surface being on the arc shaped surface and being configured to receive incident light beams.