In modern anesthesia, temperature monitoring is as necessary and non-negotiable as cardiac and oxygen saturation. But at present, even in top hospitals, temperature monitoring and warming, are not yet recognized, and here it is important to emphasize again. Mammalian organisms, require thermoregulation. Thermoregulation, there are autonomous (such as looking for clothes) and involuntary (such as shivering) behavior, all of which is the brain in the sense that the body temperature is out of the tolerance range of the time, to the body under the instructions of the body parts to reflect. Normal body temperature control range is accurate within 0.2 degrees. Under general anesthesia, the brain’s window for sensing the temperature tolerance range is widened, which means that the command to regulate temperature is issued later. Under anesthesia, both voluntary and involuntary behaviors are lost, which, together with a variety of factors such as vasodilatation, hypovolemia, decreased perfusion, exposure of the body and wounds, cold water flushing, cold fluid blood, and the loss of skin as an important organ for regulating body temperature after burns, causes a rapid drop in body temperature (Sessler. N Engl J Med. 1997;12;336(24):1730 -7) Hypothermia is frequently seen in surgery. Statistically, intraoperative temperatures drop below 36 degrees in half of all patients and below 35 degrees in 1/3 (Vaughan 1981, Frank 1992, Morris 1971). Consequences of hypothermia include delayed wound healing (Kurz 1996), myocardial ischemia and severe tachycardia (Frank 1997), and coagulation disorders (Sessler 1997). More recently, Sessler’s group sifted through more than 1,800 articles and conducted a meta-analysis of 14, which showed that even a decrease in body temperature of less than one degree increased the chance of intraoperative bleeding by 16% and blood transfusion by 22% (Sessler, 2008). We have also talked in the past about hypothermia, acidosis, and coagulation disorders being a mutually exacerbating triangle of death in surgery. Currently, the Surgery Care Improvement Project (SCIP) has established specific requirements for anesthesia by requiring patients to arrive in the recovery room at 36 degrees. To keep the patient warm during surgery, it is necessary to monitor the body temperature first, which requires that you use the temperature probe and not use the instrument as a decoration. Warming can be accomplished by: room temperature control (e.g., burn rooms); hot blankets, heaters; thermal caps, or cotton or wool caps; fluid heating; and respiratory heating. It makes sense for ASA to make temperature a mandatory measurement. I hope everyone takes action.