A method for verifying instructions of a diagnostic equipment, wherein the method is applied in a lower computer of the diagnostic equipment and comprises: obtaining first verification data, which is encrypted, sent from an upper computer of the diagnostic equipment, wherein the first verification data is received and stored by the diagnostic equipment when a software version of the diagnostic equipment is updated, and the first verification data comprises a set of instructions that are sent from the upper computer to the lower computer in the software version; decrypting the first verification data to obtain the set of instructions; and comparing instruction data received from the upper computer with the set of instructions, and judging whether the instruction data complies with the set of instructions; executing the instruction data if the instruction data complies with the set of instructions; and refusing to execute the instruction data if the instruction data doesn't comply with the set of instructions, wherein the first verification data further comprises a version certificate, the version certificate is generated by a server configured to provide the updated software version; the step of decrypting the first verification data to obtain the set of instructions specifically comprises: decrypting the first verification data to obtain the set of instructions and the version certificate; before comparing the instruction data received from the upper computer with the set of instructions, the method further comprises: checking whether the version certificate is legalized; executing the step of comparing the instruction data received from the upper computer with the set of instructions if the version certificate is legalized; or ending this diagnosis operation if the version certificate is illegal. obtaining first verification data, which is encrypted, sent from an upper computer of the diagnostic equipment, wherein the first verification data is received and stored by the diagnostic equipment when a software version of the diagnostic equipment is updated, and the first verification data comprises a set of instructions that are sent from the upper computer to the lower computer in the software version; decrypting the first verification data to obtain the set of instructions; and comparing instruction data received from the upper computer with the set of instructions, and judging whether the instruction data complies with the set of instructions; executing the instruction data if the instruction data complies with the set of instructions; and refusing to execute the instruction data if the instruction data doesn't comply with the set of instructions, wherein the first verification data further comprises a version certificate, the version certificate is generated by a server configured to provide the updated software version; the step of decrypting the first verification data to obtain the set of instructions specifically comprises: decrypting the first verification data to obtain the set of instructions and the version certificate; before comparing the instruction data received from the upper computer with the set of instructions, the method further comprises: checking whether the version certificate is legalized; executing the step of comparing the instruction data received from the upper computer with the set of instructions if the version certificate is legalized; or ending this diagnosis operation if the version certificate is illegal. decrypting the first verification data to obtain the set of instructions and the version certificate; before comparing the instruction data received from the upper computer with the set of instructions, the method further comprises: checking whether the version certificate is legalized; executing the step of comparing the instruction data received from the upper computer with the set of instructions if the version certificate is legalized; or ending this diagnosis operation if the version certificate is illegal. checking whether the version certificate is legalized; executing the step of comparing the instruction data received from the upper computer with the set of instructions if the version certificate is legalized; or ending this diagnosis operation if the version certificate is illegal.