Abstract: Based on enterprises survey and statistical analysis, six measurement dimensions for knowledge work efficiency (KWE) were extracted, and the unbalance of KWE dimensions was presented. Accordingly, a measurement equation of KWE with completion of tasks, quality, effectiveness, client satisfaction and creativity as indicators, and with task time as measurement criterion was built. Efficiency of the adaptive design of an LS spiral conveyer was experimentally measured with the equation, and the results show the equation is valid.