A transformative beryllium metallurgy theory and method was proposed based on the low-temperature dissociation of hydrofluoric acid and purification by exploiting the large difference of fluoride solubility. Hydrofluoric acid can quickly dissociate beryllium ore powder directly at low or room temperature with more than 99% dissociation rate. The solubility of AlF₃, FeF₃, CrF₃, and MgF₂ is low. Coupled with common ion effect, 99.9%-purity beryllium products can be prepared without chemical purification. For high-purity beryllium products of grade 4N or higher, they can be prepared through the superior property that the pH intervals of iron, chromium, and other hydroxide precipitates are distinctly different from those corresponding to Be(OH)₂ precipitates. This new method can be used to prepare most of the beryllium products that are prepared by modern beryllium metallurgy.