Abstract: Collected-microelectrodes system is a new method in corrosion electrochemical measurement. It may collect a great number of electrochemical data including those of surface potential distribution of a corroding sample in a very short time. From this, the transient electrochemical characteristics of the sample may be analyzed more clearly. Because of the large number of the collected data, which may reach up to 88000 per second, a superior data processing method is necessary. The following software is specially designed for this, which consists of two parts. The first part concerns with single microelectrode, and the second part relates with collected-microelectrodes.