To easily and accurately characterize electrochemical properties of large particles, a homemade streaming potential device was used to measure streaming potential of Fe hydroxide-coated quartz for calculation of its ζ potential. Results show that this device is capable of determining streaming potential (ΔE) accurately regardless of hydraulic differential (ΔP). Between the two exists an excellent linear relationship, which guarantees the accuracy of streaming potential coefficient (C) obtained through fitting ΔE with ΔP. Hence, the ζ potential of Fe hydroxide-coated quartz figured out from C is good enough to characterize the surface electrochemical characteristics of the Fe hydroxide-coated quartz very well. In the same electrolyte solution, absolute value of the ζ potential of Fe hydroxide-coated quartz decreases with the increase in coating degree. When ionic strength is low, the electric double layer on Fe hydroxide-coated quartz is quite thick, occupying a large proportion of a capillary pore, thus making it necessary to take into account the effect of surface electric conduction in measuring ζ potential of coated particles based on streaming potential. The electric double layer on Fe hydroxide-coated quartz is compressed with increasing ionic strength of the electrolyte solution, thus causing the absolute value of ζ potential to decline. The isoelectric point of Fe hydroxide-coated quartz measured with the streaming potential method was 4.6. When the electrolyte solution pH went above the isoelectric point, ζ potential of Fe hydroxide-coated quartz was negative and turned more negative with rising pH. However, when the solution pH fell below the isoelectric point, the ζ potential turned positive and increased with declining pH. A significantly positive relationship between the ζ potential of quartz worked out from streaming potential and the ζ potential of quartz colloids measured with the electrophoresis method was observed, suggesting that the streaming potential method for measuring ζ potential of particles was reliable.