The invention relates to an optics and positron emission tomography (PET) dual-mode developer (formula 1) targeted to apoptotic cells and beta-amyloid protein, namely, a positron-nuclide-labeled 4-dansyl amido-4'-diphenylethylene compound. A synthesis method of the compound includes the steps that dansyl targeted to apoptotic cells and 1,2-diphenylvinyl-amino targeted to beta-amyloid protein are bound together, and then labeling is conducted. The compound is simple in radiosynthesis method, high in radiochemical yield and convenient to synthesize automatically, has broad application prospects and can be applied to anti-tumor therapy monitoring and differential diagnosis and scientific research on neurological and psychotic disorders like Alzheimer disease (AD). The formula 1 is defined in the description.