A method for operating an electronic device includes: determining a plurality of influence parameters associated with a target disease, the influence parameters at least include a body mass index； determining calculation parameters according to the influence parameters, and determining a risk prediction model for the target disease based on the calculation parameters； collecting medical diagnosis information of an object to be tested corresponding to the influence parameters, and inputting the medical diagnosis information to the risk prediction model to obtain a first risk prediction value； substituting a value of the body mass index in the medical diagnosis information with a weight management target value, inputting the medical diagnosis information to the risk prediction model again to obtain a second risk prediction value； and calculating a weight management benefit prediction value corresponding to the weight management target value according to the first risk prediction value and the second risk prediction value.
