The invention discloses an intelligent test system and method for a wind power plant grid connection test. The test system comprises a dispatching command analysis module, a command real-time receiving module, a device starting module, an analog acquisition module, an analysis and calculation module, a clock module, a data output module and a waveform drawing module. The test method comprises the steps that (1) target command signals issued by a dispatching control center are received; (2) voltage and current signal data of a wind power plant are collected; (3) the active values, the passive values and the power angle values of the wind power plant are calculated according to collected voltage and current signals; (4) the received target command signals and the collected and calculated data are output synchronously under time signals; (5) waveforms are drawn and output according to related data under a time coordinate. According to the intelligent test system and the method for the wind power plant grid connection test, the target command signals and the collected and calculated wind power plant signals are output synchronously by adopting the unified clock module, the target values, the measured values and the calculated values can be compared accurately, the error that the data are not unified is avoided, and the accuracy of the wind power plant grid connection test is improved.