At the first an introductory concept to the thermochromic liquid crystal (TLC) and the liquid crystal thermography has been explained. Based on the our experiences in application of the TLC for the heat transfer measurements, the liquid crystal thermography calibration procedures have been briefly described, and the parameters, which can influence the TLC temperature measurement variation, have been analyzed. The analysis shows that the use of an image noise reduction technique, the TLC coating thickness, the lighting angle, and the coating quality can impact the TLC hue calibration and the temperature measurement variation. Later on examples of the applications of the steady and transient liquid crystal thermography techniques to the heat transfer having turbulence measurements have been given.