This paper examined the effects of crucial parameters, including W/B, binder content, alkali component, on compressive strength of alkali-activated slag concrete. Based on results obtained, the statistical distribution and variance (standard deviation) of compressive strength results were estimated, and the analysis results from experimental data indicated that the compressive strengths of AASC at the age of 28 day fitted normal distribution and is inversely proportional to the liquid-solid ratio. The relationship between W/B and compressive strength was established through regression analysis, the regression coefficient of formula α_a and α_b is 0.796 and 0.897 respectively. As such, a simple mix design method for alkali-activated slag concrete was proposed.