The results of the development of a new computer guidance method for senior schoolchildren on the basis of “Formulas of the profession” (E.A. Klimov) and a modern scheme for the analysis of professions (N.S. Pryazhnikov) are presented. The main stages of obtaining expert estimates are shown, which made it possible to correlate the components of professional activity with the official list of enlarged specialties of the Ministry of Education and Science of the Russian Federation. The advantage of 3-level grades of schoolchildren (“I want”, “I can now” and “could in the future”) is considered before the traditional assessment of schoolchildren’s actual preferences. In the process of choosing a profession, the preferred characteristics of future work activity are set not in the form of direct estimates of their traditional designations (subject, purpose, means, conditions, etc.), but through paired comparisons of the main labor activities and training activities. The computer-based online testing system works with the methodology through the Web-interface on modern software platforms — Windows, Android, MacOS, iOS, Linux.