Modern users demand that the solenoid actuator for valve operation must have quicker response time and better product reliability. For satisfying these requirements, two kinds of different techniques are needed. This paper presents a speed increasing method of solenoid actuator using a solenoid design method by some governing equations which are composed of electromagnetic theory and empirical knowledge and permanent magnets as assistant material. And also, 6 kinds of detailed failure mode analysis and the useful reliability parameters of solenoid actuator like shape parameter, scale parameter were presented. The validity of the proposed design method and deducted reliability parameters are proved by performance test results.