Today, simplified travel across the world caused criminals to flee to other count tries after committing a crime in order to escape from punishment. Since the sovereignty of the governments are limited to their own territory, positive mutual collaboration among countries, particularly neighboring countries, could affect the compliance with countries’ requests in the global system and the establishment of a Equitable Penalty System. As a result of this cooperation, criminals couldn’t sense safe and security in the world.This article under title “Interpol Performance Review on Extradition & Its Improvement Solutions” is a descriptive study and efforts to survey Interpol performance on extradition and its effective factors. The central issues of this paper are to determine problems and barriers to criminals’ extradition, provide solutions, and develop extradition.According to the research bases on Interpol performance about criminals’ extradition some indexes and characteristics were determined, and research hypotheses (5 hypotheses) have been put forward concerning the effective factors. To gather data, a questionnaire was set, including: 1111 closed questions and one open question, also, a data collecting form which derived from some extradition cases in IP Tehran was applied. A statistical universe sample (consists of 60 experts) completed the forms. Data analysis which accomplished through statistical software SPSS & MINITAB showed that there is a connection between determined indexes and criminals’ extradition from other countries. To carry out a survey into hypotheses One Sample T-Test, Sign Test, and Friedman ANOVA were applied. Statistical analysis and tests confirmed all of five hypotheses and showed a meaningful relationship between mentioned factors and the success of criminals’ extradition.