AIDS test strips can be divided into blood test strips, urine test strips, saliva test strips three, the use of the method are sampling test, need to be specified. 1. Blood test strips: open the blood test strips, find the sampling area, and then the extracted blood drops into the sampling area, generally need to wait about 20 minutes. After that, observe the reaction of the quality control area and the detection area. If the quality control area shows a red line, it means the test paper is working normally, and no red line in the detection area means there is no infection. 2. Urine test paper: urine test paper operation method and blood test paper is similar, but also to find the sample hole, in the hole into the urine, 20 minutes to observe the results. If there is a red line in each of the quality control area and the detection area, it represents a positive test result and may have been infected. 3. Saliva test paper: Saliva test paper is to take the oral mucous membrane exudate, drop into the spiked area, the same observation for about 20 minutes, if only a line appears in the quality control area, generally represents a negative, if the test paper appears two red lines, represents a positive. Since the accuracy of HIV test strips cannot reach 100%, if the test result is abnormal, it is best to consult a doctor in time and confirm the diagnosis through other methods of testing.