The article includes the application of theoretical research methods: analysis, comparison, generalization and systematization. It reveals the author’s interpretation of the concepts “professional competence”, “bachelor of computer technology” and “formation of professional competence of bachelor of computer technology” as a systematic, focused and organized process of training a specialist capable of working in various fields of professional use of modern computer technology and the Internet; also ready to apply methods of making scientifically sound decisions with the help of expert systems and the latest information technologies, etc.The generalized composition of professional competence of future bachelors in the field of computer technology included: information, technical, subject (individual disciplines of professional training), research, self-education, communication, and self-regulation.In order to diagnose the formation of professional competence of future bachelors in “Professional Education (Computer Technology)” the following criteria and indicators are identified: 1) motivational and value: awareness, attitude, interest, motivation, values, the desire to acquire professional competence, self-competence, self-development and self-regulation; 2) cognitive: knowledge (professional): analytical, algorithmic, design, communication, organizational, control, evaluation and creative; 3) operational activities: abilities (organization, design, application / use, implementation, research, creative activity); 4) subjective: reflection, personal qualities, and self-regulation.The following methods were used to diagnose the formation of professional competence of future bachelors in the speciality “Professional education (computer technology)”: observation, survey (interview, questionnaire), testing, expert assessment and some methods.We identified that the initial level of formation of professional competence of bachelors in the field of computer technology in the process of professional training has 50.25 % of EG students (CG – 50.73 %), average – 35.96 % (CG – 36.10 %), high – 13.79 % (CG 13.17 %), which indicates the inefficiency of the traditional organization of such training in higher education institutions for the formation of our studied qualities.
 Keywords: professional competence, bachelor of computer technology, formation of professional competence of computer technology bachelor, diagnosis, criteria, indicators and levels.