In this study, investigating the effect of project based learning (PBL) model designing with the meaningful field trip was applied to the Solar Energy and Its Usage Areas (SEUAs) topic in Physics lesson, at high school level students' achievement, attitude towards topic and ecology. At the study, quasi-experimental pattern with the pre-post test control group has been used, in addition students' opinions of the meaningful field trip was applied content analysis. The sample of the research was determined 12th high school students which learned Gulkent Anatolian School in Isparta city at 2008-2009 educational term. The instruction of SEUAs was used 5E learning cycle model instruction design in field trip preparing at The Renewable Energy Research&Implemantation Center (RERIC) at Suleyman Demirel University.. The results of study, the experimental group of students' achievements and attitudes towards ecology and SEUAs topic was positively increased according to control group.