In all parts of our daily lives, individuals meet technology and technological tools. For this reason, individuals from all professions should be knowledgeable about these concepts. One of these professions covers pre-service teachers, who are considered as to be future teachers. The aim of this research was not only to examine the influence of the projects carried out by science pre-service teachers with technological tools on their levels of environmental literacy, but also to reveal which of the innovator categories in Rogers's (1962) Theory of Diffusion of Innovations they belonged to. In the research, the mixed research design was used since qualitative and quantitative data were required. The research sample included 110 science pre-service teachers. All the science pre-service teachers constituted the quantitative sample, while 10 randomly selected pre-service teachers formed the qualitative sample group. In the research, environmental literacy scale, semi-structured interview technique and researcher reflections were used as the data collection tools. It was found that the science pre-service teachers belonged to the categories of "Innovators" and "Early Adopters" according to Roger's theory in terms of technology use.