An analyzer and a control method thereof, a detection system, and a storage medium are provided. The control method of the analyzer includes: determining whether the analyzer obtains an analysis parameter corresponding to a detection chip used for detection: requesting and obtaining the analysis parameter in a case of being determined that the analyzer does not obtain the analysis parameter; and performing detection on the detection chip and analyzing a substance to be analyzed contained in the detection chip by using the analysis parameter to obtain analysis data of the substance to be analyzed in a case of being determined that the analyzer obtains the analysis parameter.