Objective : This study is designed to evaluate the correlation between the data of DITI (Digital Infrared Thermographic Imaging) and the clinical symptoms in the patients with low back pain. Methods : Among the outpatients with back pain who visited to Department of Acupunture & Moxibustion, Tae gu Oriental Hopital of Kyung San University from January 2000 to August, we selected 115 cases that examined DITI. We evaluated the correlation between the data of DITI examination and the clinical symptoms (Distribution of Sex and Age, Duration of Disease, Main Sign, Grade of Clinical Symptoms, Diagnosis according to Symptoms(辨證),) in the patients with low back pain. Results & Conclusion : 1. The thermal changes in terms of the duration of disease : The acutest period has the highest thermal change. Also, the longer the duration of disease was, the higher the termal change was. It increased in the order of the acutest period, the less acute period, and the the chronical period. 2. Thermal changes due to the main symptom : The degree of thermal change was as follows (from the highest to the lowest): first, back and knee pain, second, back and leg pain, third, back and buttock pain, fourth, numbness of leg, and fifth, back and dorsum pain. 3. Thermal changes in terms of the grade of clinical symptoms : The more servious the symptoms were, the higher the thermal change was. It was increased in the order of Gr 1, Gr 2, Gr 3, and Gr 4. 4. Thermal changes depdning on symptoms diagnosis : Chwaseom(挫閃) has the highest temperature, $0.87{\pm}0.49^{\circ}C$. 5. Thermal changes before and after treatment : Before treatment, the average thermal change was $0.83^{\circ}C$ but after treatment, it was decreased to $0.38^{\circ}C$. For the above symptoms, if DITI is used, the diagnosis is easier based on the medical history of the patient who has back pain, and the degree of pain. However, if thermal change is soly used for diagnosis, it will be hard to determine the nature of sickness. Therefore, it should be folllowed by other supplementary examination.