1. At present, contributions to hyperon polarization derived from hadron decay have been argued, but in this argument decay polarization transfer factor is assumed as a constant usually.

2. We show that measuring the polarization of hyperon in the lepton induced reactions is an ideal way to study the spin transfer in high energy hadronization processes.

3. A review is given on recent studies of hyperon rare decay both in theory and experiment.

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4. The lifetime of a hyperon bounded in a hypernucleus is affected by the nuclear environment.

5. By analyzing different hyperon decay processes, we derive the general formula for the decay contributions of heavier hyperons to hyperon production rates and final-state hyperon polarizations.

6. We investigate the influence of different hyperon couplings from analysis of various experimental data on hypernuclei on the composition and equation of state of cold neutron star.

7. The result shows that decay spin transfer factor strongly depend on moving direction of final-state hyperon.

8. A brief review is given on recent studies of hyperon rare decay both in theory and experiment.

9. A brief review is given on recent studies of hyperon rare decay both in theory and experiment. Souse problems which exist in the field are presented.

10. The main goal of this dissertation is the experimental and phenomenological study of hyperon spectroscopy.