Indonesia needs smart technology which is possible to change the life better socially, economically and religiously. It study is multidisciplinary research; social and technic. We use descriptive and qualitative method. We made observation to find out the problem then apply the need using necessary technology. Since we have done the first step, we built the solar system to change into electricity in a field Bandungan, Kajen, Pekalongan. This is historical area where the youth fought again VOC and the treacherous PKI. There is no activity in night, but in day is very busy. Some communities use it for sport activity and the other is for togetherness. The purposes of the study are knowing the necessary technology for make a bridge between three communities in public area, how to apply the cheap and easy solar cell system for public area, and how the effectiveness of the system for changing better life.