The study attempts to assess the effect of an e-portfolio design by students on the method of building their personalized professional project. The e-portfolio may allow students, guided by a process of design – supported by an ergonomic thinking – to develop in an autonomous way their project. A study was undertaken over a two year period with a public of students in technological field, data-processing specialization. The results show that the suggested scenario makes it possible to support not only the construction of the project of the student but supports also the design of his digital identity and his personal learning environment.