A system, methods, computer program product, a web site and an Artificial Intelligence system for evaluating a patent document have been provided. According to the methods for patent evaluation of the embodiments of the invention, the patent document is characterized by a number of patent indices arranged into a hierarchy, each index reflecting a different aspect of the patent document. The indices are combined into a Patent Quality index, which is an integral characteristic of the patent document, according to a non-linear scale, which preferably satisfies certain predetermined rules derived from the best practices of qualified experts. In one of the embodiments, a bias associated with an expert, influencing the evaluation of a patent has been taken into account. A corresponding method for determining a monetary value of the patent document is also described. The system for patent evaluation comprises a Patent Quality and Monetary Value processing unit for implementing one of the methods, and respective input and output data means, including a friendly graphical user interface. The system is implemented to be accessible via a network. A corresponding web site having a link, causing a computer program associated with the web site, which performs one of the methods, to execute and to display the results of the execution on a screen, is described. An Artificial Intelligence (AI) system for analyzing and interpreting patent indices and a Visualization unit for color-coded visualization of the results of evaluation are also provided.