The solvency regulation in Taiwan insurance industry is risk-based system, which has been set move over than 15 years since 2003. The currently risk factors of this systems were calculated by Vale at Risk. However, one issue of those risk factors should be improved is the estimated method, which may not fully or acutely reflect the risk of individual asset and liability. This study proposes to use new way, which called Riskiness, to estimate the risk factors. Furthermore, this study applies the new calculation using the actual weekly stock market data in Taiwan from 1999 to 2018 to confirm the possibility to re-think the issue of risk factors. The data is downloading from the database provided by the TEJ, Taiwan.