Mold temperature is one of the most important parameter in injection molding process of thermoplastic polymers – particular semi crystalline polymers. There are a lots of methods of control mold temperature but it is not simple and easy to measure that precisely. Injection molding tools have usually a large mass and this is equal also to large heat capacity of tools and its thermal inertia. Measuring of temperature by using of contact equipment causes a lot of mistakes, because that method is based on heat transfer between thermocouple and measured area of mold. Result of research of 3 different method of temperature control of mold surface were present in the publication. For this purpose a special experimental mold was made. Mold has eight independent cooling circuits which was connected to the thermo controller Wittmann with two circuits. The main aim of research was to determine the effect of normal process of injection molding on temperature changing in different area of mold. Under the cavity 4 thermocouple were placed and connect to the recorder which gave a possibility of uploading data during injection process. For that research mold temperature was change in many different layouts. Data and sequences of changes in temperature collected during tests gave very interesting result for discussion. Furthermore use of differences in temperature profile of the mold causes different temperature profile recorded during injection molding. Tests were made by using fallow equipment Krauss Maffei injection molding machine KM65-C4 and thermo controller Wittmann TPplus2, Shini Rotameter, infrared thermo vision camera TESTO-890, and thermocouple signal recorder with 4 thermocouples of diameter 1mm located in injection mold 3mm under cavity surface. Draft of experimental mold and thermocouple location were presented in the article, and results of research as a drafts and charts of temperature changing in different area of mold were included.