Purpose: This study aims to promote an evaluation of the acceptance and use of the implanted technology (Electronic Information System) in a public institution in the state of Pernambuco, from the perspective of internal users of the system in the light of the Unified Theory of Acceptance and Use of Technology (Venkatesh, Morris, Davis & Davis, 2003). Methodology: A quantitative, analytical and descriptive approach with an exploratory objective was used. Data were collected using a structured form with statements grouped by constructs, elaborated and applied via google forms, using the Likert scale. The treatment of the collected data was carried out in two ways: i) descriptive statistics for the questions that deal with the demographic profile of the respondents, called moderating variables, according to the theory; and ii) the Average Ranking method was applied, confronting the aspects proposed in the theory for specific questions, verifying whether the notes of the sample responses correspond to the findings of the renowned author with respect to the relationship between constructs. Results: The results obtained point out that age, gender and experience directly influence the constructs. It is concluded, therefore, that there is a reasonable level of acceptance and use of CES. Although there is still resistance and conflicts to be faced in public management, most users see and understand positively that the system presented in the present study has been a relevant tool in public management, contributing to the management and control of information without leaving aside, support for decision-making, helping to improve the use of resources. Contributions of the Study: The results contribute to the specific literature, because it presents results on acceptance and use in the public sphere, which can subsidize the process of implantation of the CES in other agencies, as well as for future research involving similar situations.