Recently, high power laser diode (more than 100W), LD pumped YAG (more than 4kW), 10kW lamp pumped YAG laser and 10kW chemical oxygen-iodine laser (COIL) have been developed in the industrialized countries such as Germany, United States and Japan, which had their own big national projects. As a result of large numbers of research and developments, the modern laser materials processing has been realized and used in all kinds of industries now. At the end of 20th century, the price of laser diode has become lower and competitive to the conventional lasers. Lower the price of laser systems, wider is the field of their applications. In the present paper, the research and developments of laser materials processing in US, EU and Japan are outlined as a review.