It is estimated that in the economic sphere about 80% of the regulations in the Member States are derived from EU regulations. This trend towards extending the scope of EU regulation has been accompanied by discussions on how to improve their quality and simplify them. At the beginning of the 21st century they were subjected to a certain institutionalization. An analysis of the evolution of this issue is the subject of this article. The assessment of the quality of EU law is based on three main assumptions. Firstly, effectiveness, defined by the real effects of regulation. Second, efficiency measured by the cost ratio of a regulation to its effects. And third, utility, assessed by the scale of the benefits of a particular legal regulation. With regard to measures to improve the quality of European Union law, the „propaganda” aspect is still important. Due to the multitude of EU acts, the elimination of obsolete, unclear or contradictory acts, overly complicated, overlapping in the regulatory area, overburdening the actors to whom they are referring, or excessively meticulous, undoubtedly poses a positive „image” effect in perceiving the impact of activities within the organization. In the context of the above, the analysis of documents and literature on the issue of improving the quality of EU legal acts is becoming a key research area of this study. It concludes that the activities undertaken in this regard should be considered in two relatively independent aspects: material (referring to the content of the legislative act) and formal (referring to the appropriate preparation of the draft act and public approval for its validity).