The invention discloses a multichannel high-precision intelligent coke oven temperature measurement method and a multichannel high-precision intelligent coke oven temperature measurement device. The multichannel high-precision intelligent coke oven temperature measurement method comprises the following steps of initializing a system, initializing a PB-OEM2-SEA module, starting, allocating a channel, starting conversion, performing conversion, checking whether conversion is finished, reading a result, processing data, indicating a fault and performing communication processing. The multichannel high-precision intelligent coke oven temperature measurement device comprises a power supply part, a digital temperature measuring part, a core processing part, a fault indication part, a communication interface part and 1-19 sensor parts. The multichannel high-precision intelligent coke oven temperature measurement method and the multichannel high-precision intelligent coke oven temperature measurement device are advantageous in that simple and reliable circuit is realized; the multichannel high-precision intelligent coke oven temperature measurement device can be connected with almost all standard thermocouples and non-standard thermocouples; the multichannel high-precision intelligent coke oven temperature measurement device is provided with multiple channels and furthermore can perform operation conversions on the channels; automatic fault detection and fault indication can be realized; high measurement accuracy is realized; the multichannel high-precision intelligent coke oven temperature measurement device and the multichannel high-precision intelligent coke oven temperature measurement method can operate in an RS485 communication manner and a Profibus-DP communication manner; and high communication reliability is realized.