The article presents the waterjet technology development and prospects for their improvements based on a number of theoretical and pilot studies. A special attention is paid to various aspects relating to physical phenomena accompanying the waterjet material processing and also to technological parameters interrelations. The carried-out experimental and theoretical data analysis has revealed groups of corresponding factors in materials and liquids waterjet processing which enable to make the hypothetical assumption that a number of them has been studied insufficiently and they, with a rather high degree ofprobability, are perspective for future researches and have an opportunity to become a basis for some new applications of hydrotechnologies. According to results of numerical modeling by a finite element method main stages related to consecutive development of wave processes in a specified material and on its surface were defined. The article emphasizes the perspective innovative directions of research developments in the field of hydrotechnologies applications - diagnostics of materials and coatings, micro-suspending, disinfecting and activation of hydrotechnological environments, etc.