This study examined the difference among the peak oxygen uptake (□O2peak) of 1,600m running-walking test (1,600MRW), the □O2peak of 12-minute running-walking test (12mRW), and the oxygen uptake of 3-minute step-test and determined the cross reference intensity model among 1,600MRW, the distance of 12mRW and the recovery index of 3-minute step-test. Thirty healthy college students participated in this study. The average age was 20.37±1.79 years, the average height was 173.1±5.1 cm, and the average weight was 66.3±7.6 kg. Partable spirometry was used for the test. All subjects participated in 1600MRW, 12mRW and 3-minute step-test. The result of this study showed no difference between the □O2peak of 1,600MRW and the □O2peak of 12mRW, but the oxygen uptake of 3-minute step-test was different from that of 1,600MRW and 12mRW. The predicting power (R2) of 1,600MRW and 1,600MRW □O2peak was 0.603, and the 12mRW and 1,600MRW □O2peak was 0.509. The regression predicting power (R2) of 3-minute step-test was 0.132. According to the result of this study, the predicting power of 3-minute step-test was low and not suitable for predicting subjects' □O2peak. Additionally, the predicting powers of 1,600MRW and 12mRW were high, which were suitable for predicting subjects' □O2peak.